[PATCH v2 00/23] powerpc: Fix W=1 compile errors

Hello,

Here is an assorted collection of fixes for W=1.

After this series, only a few errors are left, some missing declarations
in arch/powerpc/kernel/sys_ppc32.c, panic_smp_self_stop() declaration
and a few of these which I don't know how to fix :

  ./arch/powerpc/xmon/xmon.c: In function ‘xmon_print_symbol’:
  ./arch/powerpc/xmon/xmon.c:3656:14: error: variable ‘name’ might be clobbered by ‘longjmp’ or ‘vfork’ [-Werror=clobbered]
   3656 |  const char *name = NULL;
        |              ^~~~

Cheers,

C. 

Changes in v2 :

 - improved commit logs
 - reworked some changes to reduce the number of lines. 
 - fixed misuse of asm/asm-prototypes.h for soft_nmi_interrupt()
 
Cédric Le Goater (23):
  powerpc/mm: Include __find_linux_pte() prototype
  powerpc/pseries/ras: Remove unused variable 'status'
  powerpc/pseries/eeh: Make pseries_pcibios_bus_add_device() static
  powerpc/pseries/ras: Make init_ras_hotplug_IRQ() static
  powerpc/pmem: Include pmem prototypes
  powerpc/setup_64: Make some routines static
  powerpc/mce: Include prototypes
  powerpc/smp: Include tick_broadcast() prototype
  powerpc/smp: Make debugger_ipi_callback() static
  powerpc/optprobes: Remove unused routine patch_imm32_load_insns()
  powerpc/optprobes: Make patch_imm64_load_insns() static
  powerpc/mm: Declare some prototypes
  powerpc/mm: Move hpte_insert_repeating() prototype
  powerpc/mm: Declare preload_new_slb_context() prototype
  powerpc/mm/hugetlb: Make pseries_alloc_bootmem_huge_page() static
  powerpc/mm: Declare arch_report_meminfo() prototype.
  powerpc/watchdog: Declare soft_nmi_interrupt() prototype
  KVM: PPC: Make the VMX instruction emulation routines static
  KVM: PPC: Book3S HV: Include prototypes
  KVM: PPC: Book3S HV: Declare some prototypes
  powerpc/pseries: Make IOV setup routines static
  powerpc/pcidn: Make IOV setup routines static
  powerpc/pseries/eeh: Make pseries_send_allow_unfreeze() static

 arch/powerpc/include/asm/book3s/64/mmu-hash.h |  5 +++++
 arch/powerpc/include/asm/kvm_book3s.h         |  7 +++++++
 arch/powerpc/include/asm/nmi.h                |  1 +
 arch/powerpc/include/asm/pgtable.h            |  3 +++
 arch/powerpc/kernel/mce.c                     |  1 +
 arch/powerpc/kernel/optprobes.c               | 21 +------------------
 arch/powerpc/kernel/setup_64.c                |  7 ++++---
 arch/powerpc/kernel/smp.c                     |  3 ++-
 arch/powerpc/kernel/watchdog.c                |  1 +
 arch/powerpc/kvm/book3s_64_mmu_hv.c           |  1 +
 arch/powerpc/kvm/powerpc.c                    |  8 +++----
 arch/powerpc/lib/pmem.c                       |  1 +
 arch/powerpc/mm/book3s64/hash_hugetlbpage.c   |  4 ----
 arch/powerpc/mm/hugetlbpage.c                 |  2 +-
 arch/powerpc/mm/pgtable.c                     |  1 +
 arch/powerpc/platforms/pseries/eeh_pseries.c  |  5 ++---
 arch/powerpc/platforms/pseries/pci.c          | 15 +++++++------
 arch/powerpc/platforms/pseries/ras.c          | 15 +++++--------
 arch/powerpc/platforms/pseries/setup.c        |  8 +++----
 19 files changed, 51 insertions(+), 58 deletions(-)

-- 
2.26.2

pseries_pcibios_bus_add_device() is a local routine defining the
pcibios_bus_add_device() handler of the pseries machine in
eeh_pseries_init(). It doesn't need to be external.

It fixes this W=1 compile error:

../arch/powerpc/platforms/pseries/eeh_pseries.c:46:6: error: no previous prototype for ‘pseries_pcibios_bus_add_device’ [-Werror=missing-prototypes]
   46 | void pseries_pcibios_bus_add_device(struct pci_dev *pdev)
      |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Fixes: dae7253f9f78 ("powerpc/pseries: Add pseries SR-IOV Machine dependent calls")
Cc: Alexey Kardashevskiy <redacted>
Cc: Frédéric Barrat <redacted>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/platforms/pseries/eeh_pseries.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/pseries/eeh_pseries.c b/arch/powerpc/platforms/pseries/eeh_pseries.c
index cf024fa37bda..de45ceb634f9 100644
--- a/arch/powerpc/platforms/pseries/eeh_pseries.c
+++ b/arch/powerpc/platforms/pseries/eeh_pseries.c

@@ -43,7 +43,7 @@ static int ibm_get_config_addr_info;
 static int ibm_get_config_addr_info2;
 static int ibm_configure_pe;
 
-void pseries_pcibios_bus_add_device(struct pci_dev *pdev)
+static void pseries_pcibios_bus_add_device(struct pci_dev *pdev)
 {
 	struct pci_dn *pdn = pci_get_pdn(pdev);
 

-- 
2.26.2

It fixes these W=1 compile errors :

../arch/powerpc/kernel/mce.c:591:14: error: no previous prototype for ‘machine_check_early’ [-Werror=missing-prototypes]
  591 | long notrace machine_check_early(struct pt_regs *regs)
      |              ^~~~~~~~~~~~~~~~~~~
../arch/powerpc/kernel/mce.c:725:6: error: no previous prototype for ‘hmi_exception_realmode’ [-Werror=missing-prototypes]
  725 | long hmi_exception_realmode(struct pt_regs *regs)
      |      ^~~~~~~~~~~~~~~~~~~~~~

Cc: Ganesh Goudar <redacted>
Cc: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/kernel/mce.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/kernel/mce.c b/arch/powerpc/kernel/mce.c
index 9f3e133b57b7..c381dc2f9858 100644
--- a/arch/powerpc/kernel/mce.c
+++ b/arch/powerpc/kernel/mce.c

@@ -21,6 +21,7 @@
 #include <asm/machdep.h>
 #include <asm/mce.h>
 #include <asm/nmi.h>
+#include <asm/asm-prototypes.h>
 
 static DEFINE_PER_CPU(int, mce_nest_count);
 static DEFINE_PER_CPU(struct machine_check_event[MAX_MC_EVT], mce_event);

-- 
2.26.2

init_ras_hotplug_IRQ() is a local routine used by a machine init call
and it doesn't need to be external.

It fixes this W=1 compile error:

../arch/powerpc/platforms/pseries/ras.c:125:12: error: no previous prototype for ‘init_ras_hotplug_IRQ’ [-Werror=missing-prototypes]
  125 | int __init init_ras_hotplug_IRQ(void)
      |            ^~~~~~~~~~~~~~~~~~~~

Fixes: c9dccf1d074a ("powerpc/pseries: Enable RAS hotplug events later")
Cc: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Cc: Ganesh Goudar <redacted>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/platforms/pseries/ras.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c
index bcb614ffce6a..d2fca1aa6742 100644
--- a/arch/powerpc/platforms/pseries/ras.c
+++ b/arch/powerpc/platforms/pseries/ras.c

@@ -122,7 +122,7 @@ static inline u8 rtas_mc_error_sub_type(const struct pseries_mc_errorlog *mlog)
  * devices or systems (e.g. hugepages) that have not been initialized at the
  * subsys stage.
  */
-int __init init_ras_hotplug_IRQ(void)
+static int __init init_ras_hotplug_IRQ(void)
 {
 	struct device_node *np;
 

-- 
2.26.2

patch_imm64_load_insns() is only used locally in
arch_prepare_optimized_kprobe() and does not need to be external.

It fixes this W=1 compile error :

../arch/powerpc/kernel/optprobes.c:149:6: error: no previous prototype for ‘patch_imm64_load_insns’ [-Werror=missing-prototypes]
  149 | void patch_imm64_load_insns(unsigned int val, kprobe_opcode_t *addr)

Cc: Jordan Niethe <redacted>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/kernel/optprobes.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/optprobes.c b/arch/powerpc/kernel/optprobes.c
index da6b88b80ba4..7f7cdbeacd1a 100644
--- a/arch/powerpc/kernel/optprobes.c
+++ b/arch/powerpc/kernel/optprobes.c

@@ -145,7 +145,7 @@ void arch_remove_optimized_kprobe(struct optimized_kprobe *op)
  * Generate instructions to load provided immediate 64-bit value
  * to register 'reg' and patch these instructions at 'addr'.
  */
-void patch_imm64_load_insns(unsigned long val, int reg, kprobe_opcode_t *addr)
+static void patch_imm64_load_insns(unsigned long val, int reg, kprobe_opcode_t *addr)
 {
 	/* lis reg,(op)@highest */
 	patch_instruction((struct ppc_inst *)addr,

-- 
2.26.2

It fixes this W=1 compile error :

../arch/powerpc/mm/book3s64/hash_utils.c:1867:6: error: no previous prototype for ‘hpte_insert_repeating’ [-Werror=missing-prototypes]
 1867 | long hpte_insert_repeating(unsigned long hash, unsigned long vpn,
      |      ^~~~~~~~~~~~~~~~~~~~~

Cc: "Aneesh Kumar K.V" <redacted>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/include/asm/book3s/64/mmu-hash.h | 2 ++
 arch/powerpc/mm/book3s64/hash_hugetlbpage.c   | 4 ----
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/include/asm/book3s/64/mmu-hash.h b/arch/powerpc/include/asm/book3s/64/mmu-hash.h
index cb95b16e9a7b..2bffc7a0fdb8 100644
--- a/arch/powerpc/include/asm/book3s/64/mmu-hash.h
+++ b/arch/powerpc/include/asm/book3s/64/mmu-hash.h

@@ -454,6 +454,8 @@ static inline unsigned long hpt_hash(unsigned long vpn,
 #define HPTE_NOHPTE_UPDATE	0x2
 #define HPTE_USE_KERNEL_KEY	0x4
 
+long hpte_insert_repeating(unsigned long hash, unsigned long vpn, unsigned long pa,
+			   unsigned long rlags, unsigned long vflags, int psize, int ssize);
 extern int __hash_page_4K(unsigned long ea, unsigned long access,
 			  unsigned long vsid, pte_t *ptep, unsigned long trap,
 			  unsigned long flags, int ssize, int subpage_prot);

diff --git a/arch/powerpc/mm/book3s64/hash_hugetlbpage.c b/arch/powerpc/mm/book3s64/hash_hugetlbpage.c
index b5e9fff8c217..a688e1324ae5 100644
--- a/arch/powerpc/mm/book3s64/hash_hugetlbpage.c
+++ b/arch/powerpc/mm/book3s64/hash_hugetlbpage.c

@@ -16,10 +16,6 @@
 unsigned int hpage_shift;
 EXPORT_SYMBOL(hpage_shift);
 
-extern long hpte_insert_repeating(unsigned long hash, unsigned long vpn,
-				  unsigned long pa, unsigned long rlags,
-				  unsigned long vflags, int psize, int ssize);
-
 int __hash_page_huge(unsigned long ea, unsigned long access, unsigned long vsid,
 		     pte_t *ptep, unsigned long trap, unsigned long flags,
 		     int ssize, unsigned int shift, unsigned int mmu_psize)

-- 
2.26.2

pseries_alloc_bootmem_huge_page() is only used locally in
alloc_bootmem_huge_page() and does not need to be external.

It fixes this W=1 compile error :

../arch/powerpc/mm/hugetlbpage.c:220:12: error: no previous prototype for ‘pseries_alloc_bootmem_huge_page’ [-Werror=missing-prototypes]
  220 | int __init pseries_alloc_bootmem_huge_page(struct hstate *hstate)
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Cc: "Aneesh Kumar K.V" <redacted>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/mm/hugetlbpage.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c
index 8b3cc4d688e8..4e7d9b91f1da 100644
--- a/arch/powerpc/mm/hugetlbpage.c
+++ b/arch/powerpc/mm/hugetlbpage.c

@@ -217,7 +217,7 @@ void __init pseries_add_gpage(u64 addr, u64 page_size, unsigned long number_of_p
 	}
 }
 
-int __init pseries_alloc_bootmem_huge_page(struct hstate *hstate)
+static int __init pseries_alloc_bootmem_huge_page(struct hstate *hstate)
 {
 	struct huge_bootmem_page *m;
 	if (nr_gpages == 0)

-- 
2.26.2

It fixes this W=1 compile error :

../arch/powerpc/kernel/smp.c:569:6: error: no previous prototype for ‘tick_broadcast’ [-Werror=missing-prototypes]
  569 | void tick_broadcast(const struct cpumask *mask)
      |      ^~~~~~~~~~~~~~

Cc: "Gautham R. Shenoy" <redacted>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/kernel/smp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 9e2246e80efd..a96d90d7c442 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c

@@ -34,6 +34,7 @@
 #include <linux/random.h>
 #include <linux/stackprotector.h>
 #include <linux/pgtable.h>
+#include <linux/clockchips.h>
 
 #include <asm/ptrace.h>
 #include <linux/atomic.h>

-- 
2.26.2

It fixes this W=1 compile error :

../arch/powerpc/mm/book3s64/hash_utils.c:1515:5: error: no previous prototype for ‘__hash_page’ [-Werror=missing-prototypes]
 1515 | int __hash_page(unsigned long trap, unsigned long ea, unsigned long dsisr,
      |     ^~~~~~~~~~~
../arch/powerpc/mm/book3s64/hash_utils.c:1850:6: error: no previous prototype for ‘low_hash_fault’ [-Werror=missing-prototypes]
 1850 | void low_hash_fault(struct pt_regs *regs, unsigned long address, int rc)
      |      ^~~~~~~~~~~~~~

Cc: "Aneesh Kumar K.V" <redacted>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/include/asm/book3s/64/mmu-hash.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/include/asm/book3s/64/mmu-hash.h b/arch/powerpc/include/asm/book3s/64/mmu-hash.h
index 066b1d34c7bc..cb95b16e9a7b 100644
--- a/arch/powerpc/include/asm/book3s/64/mmu-hash.h
+++ b/arch/powerpc/include/asm/book3s/64/mmu-hash.h

@@ -467,6 +467,8 @@ extern int hash_page_mm(struct mm_struct *mm, unsigned long ea,
 			unsigned long flags);
 extern int hash_page(unsigned long ea, unsigned long access, unsigned long trap,
 		     unsigned long dsisr);
+void low_hash_fault(struct pt_regs *regs, unsigned long address, int rc);
+int __hash_page(unsigned long trap, unsigned long ea, unsigned long dsisr, unsigned long msr);
 int __hash_page_huge(unsigned long ea, unsigned long access, unsigned long vsid,
 		     pte_t *ptep, unsigned long trap, unsigned long flags,
 		     int ssize, unsigned int shift, unsigned int mmu_psize);

-- 
2.26.2

Commit 650b55b707fd ("powerpc: Add prefixed instructions to instruction
data type") removed the use of patch_imm32_load_insns(). Clean it up
to fix this W=1 compile error :

../arch/powerpc/kernel/optprobes.c:149:6: error: no previous prototype for ‘patch_imm32_load_insns’ [-Werror=missing-prototypes]
  149 | void patch_imm32_load_insns(unsigned int val, kprobe_opcode_t *addr)

Cc: Jordan Niethe <redacted>
Fixes: 650b55b707fd ("powerpc: Add prefixed instructions to instruction data type")
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/kernel/optprobes.c | 19 -------------------
 1 file changed, 19 deletions(-)

diff --git a/arch/powerpc/kernel/optprobes.c b/arch/powerpc/kernel/optprobes.c
index 69bfe96884e2..da6b88b80ba4 100644
--- a/arch/powerpc/kernel/optprobes.c
+++ b/arch/powerpc/kernel/optprobes.c

@@ -141,25 +141,6 @@ void arch_remove_optimized_kprobe(struct optimized_kprobe *op)
 	}
 }
 
-/*
- * emulate_step() requires insn to be emulated as
- * second parameter. Load register 'r4' with the
- * instruction.
- */
-void patch_imm32_load_insns(unsigned int val, kprobe_opcode_t *addr)
-{
-	/* addis r4,0,(insn)@h */
-	patch_instruction((struct ppc_inst *)addr,
-			  ppc_inst(PPC_INST_ADDIS | ___PPC_RT(4) |
-				   ((val >> 16) & 0xffff)));
-	addr++;
-
-	/* ori r4,r4,(insn)@l */
-	patch_instruction((struct ppc_inst *)addr,
-			  ppc_inst(PPC_INST_ORI | ___PPC_RA(4) |
-				   ___PPC_RS(4) | (val & 0xffff)));
-}
-
 /*
  * Generate instructions to load provided immediate 64-bit value
  * to register 'reg' and patch these instructions at 'addr'.

-- 
2.26.2

debugger_ipi_callback() is a local routine used as a NMI IPI handler and
does not need to be external.

It fixes this W=1 compile error :

../arch/powerpc/kernel/smp.c:579:6: error: no previous prototype for ‘debugger_ipi_callback’ [-Werror=missing-prototypes]
  579 | void debugger_ipi_callback(struct pt_regs *regs)
      |      ^~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/kernel/smp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index a96d90d7c442..5a4d59a1070d 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c

@@ -577,7 +577,7 @@ void tick_broadcast(const struct cpumask *mask)
 #endif
 
 #ifdef CONFIG_DEBUGGER
-void debugger_ipi_callback(struct pt_regs *regs)
+static void debugger_ipi_callback(struct pt_regs *regs)
 {
 	debugger_ipi(regs);
 }

-- 
2.26.2

The last use of 'status' was removed in 2012. Remove the variable to
fix this W=1 compile error.

../arch/powerpc/platforms/pseries/ras.c: In function ‘ras_epow_interrupt’:
../arch/powerpc/platforms/pseries/ras.c:318:6: error: variable ‘status’ set but not used [-Werror=unused-but-set-variable]
  318 |  int status;
      |      ^~~~~~

Fixes: 55fc0c561742 ("powerpc/pseries: Parse and handle EPOW interrupts")
Cc: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Cc: Ganesh Goudar <redacted>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/platforms/pseries/ras.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c
index 149cec2212e6..bcb614ffce6a 100644
--- a/arch/powerpc/platforms/pseries/ras.c
+++ b/arch/powerpc/platforms/pseries/ras.c

@@ -315,12 +315,10 @@ static irqreturn_t ras_hotplug_interrupt(int irq, void *dev_id)
 /* Handle environmental and power warning (EPOW) interrupts. */
 static irqreturn_t ras_epow_interrupt(int irq, void *dev_id)
 {
-	int status;
 	int state;
 	int critical;
 
-	status = rtas_get_sensor_fast(EPOW_SENSOR_TOKEN, EPOW_SENSOR_INDEX,
-				      &state);
+	rtas_get_sensor_fast(EPOW_SENSOR_TOKEN, EPOW_SENSOR_INDEX, &state);
 
 	if (state > 3)
 		critical = 1;		/* Time Critical */

@@ -329,12 +327,9 @@ static irqreturn_t ras_epow_interrupt(int irq, void *dev_id)
 
 	spin_lock(&ras_log_buf_lock);
 
-	status = rtas_call(ras_check_exception_token, 6, 1, NULL,
-			   RTAS_VECTOR_EXTERNAL_INTERRUPT,
-			   virq_to_hw(irq),
-			   RTAS_EPOW_WARNING,
-			   critical, __pa(&ras_log_buf),
-				rtas_get_error_log_max());
+	rtas_call(ras_check_exception_token, 6, 1, NULL, RTAS_VECTOR_EXTERNAL_INTERRUPT,
+		  virq_to_hw(irq), RTAS_EPOW_WARNING, critical, __pa(&ras_log_buf),
+		  rtas_get_error_log_max());
 
 	log_error(ras_log_buf, ERR_TYPE_RTAS_LOG, 0);
 

-- 
2.26.2

Only used locally. It fixes this W=1 compile error :

../arch/powerpc/platforms/pseries/eeh_pseries.c:697:5: error: no previous prototype for ‘pseries_send_allow_unfreeze’ [-Werror=missing-prototypes]
  697 | int pseries_send_allow_unfreeze(struct pci_dn *pdn,
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~

Cc: Frederic Barrat <redacted>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/platforms/pseries/eeh_pseries.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/eeh_pseries.c b/arch/powerpc/platforms/pseries/eeh_pseries.c
index de45ceb634f9..bc15200852b7 100644
--- a/arch/powerpc/platforms/pseries/eeh_pseries.c
+++ b/arch/powerpc/platforms/pseries/eeh_pseries.c

@@ -694,8 +694,7 @@ static int pseries_eeh_write_config(struct eeh_dev *edev, int where, int size, u
 }
 
 #ifdef CONFIG_PCI_IOV
-int pseries_send_allow_unfreeze(struct pci_dn *pdn,
-				u16 *vf_pe_array, int cur_vfs)
+static int pseries_send_allow_unfreeze(struct pci_dn *pdn, u16 *vf_pe_array, int cur_vfs)
 {
 	int rc;
 	int ibm_allow_unfreeze = rtas_token("ibm,open-sriov-allow-unfreeze");

-- 
2.26.2

It fixes this W=1 compile error :

../arch/powerpc/mm/book3s64/slb.c:380:6: error: no previous prototype for ‘preload_new_slb_context’ [-Werror=missing-prototypes]
  380 | void preload_new_slb_context(unsigned long start, unsigned long sp)
      |      ^~~~~~~~~~~~~~~~~~~~~~~

Cc: "Aneesh Kumar K.V" <redacted>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/include/asm/book3s/64/mmu-hash.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/include/asm/book3s/64/mmu-hash.h b/arch/powerpc/include/asm/book3s/64/mmu-hash.h
index 2bffc7a0fdb8..f911bdb68d8b 100644
--- a/arch/powerpc/include/asm/book3s/64/mmu-hash.h
+++ b/arch/powerpc/include/asm/book3s/64/mmu-hash.h

@@ -525,6 +525,7 @@ void slb_dump_contents(struct slb_entry *slb_ptr);
 
 extern void slb_vmalloc_update(void);
 extern void slb_set_size(u16 size);
+void preload_new_slb_context(unsigned long start, unsigned long sp);
 #endif /* __ASSEMBLY__ */
 
 /*

-- 
2.26.2

It fixes this W=1 compile error :

../arch/powerpc/mm/book3s64/pgtable.c:411:6: error: no previous prototype for ‘arch_report_meminfo’ [-Werror=missing-prototypes]
  411 | void arch_report_meminfo(struct seq_file *m)
      |      ^~~~~~~~~~~~~~~~~~~

Cc: "Aneesh Kumar K.V" <redacted>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/include/asm/pgtable.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
index f7613f43c9cf..4eed82172e33 100644
--- a/arch/powerpc/include/asm/pgtable.h
+++ b/arch/powerpc/include/asm/pgtable.h

@@ -162,6 +162,9 @@ static inline bool is_ioremap_addr(const void *x)
 
 	return addr >= IOREMAP_BASE && addr < IOREMAP_END;
 }
+
+struct seq_file;
+void arch_report_meminfo(struct seq_file *m);
 #endif /* CONFIG_PPC64 */
 
 #endif /* __ASSEMBLY__ */

-- 
2.26.2

These are only used locally. It fixes these W=1 compile errors :

../arch/powerpc/kvm/powerpc.c:1521:5: error: no previous prototype for ‘kvmppc_get_vmx_dword’ [-Werror=missing-prototypes]
 1521 | int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val)
      |     ^~~~~~~~~~~~~~~~~~~~
../arch/powerpc/kvm/powerpc.c:1539:5: error: no previous prototype for ‘kvmppc_get_vmx_word’ [-Werror=missing-prototypes]
 1539 | int kvmppc_get_vmx_word(struct kvm_vcpu *vcpu, int index, u64 *val)
      |     ^~~~~~~~~~~~~~~~~~~
../arch/powerpc/kvm/powerpc.c:1557:5: error: no previous prototype for ‘kvmppc_get_vmx_hword’ [-Werror=missing-prototypes]
 1557 | int kvmppc_get_vmx_hword(struct kvm_vcpu *vcpu, int index, u64 *val)
      |     ^~~~~~~~~~~~~~~~~~~~
../arch/powerpc/kvm/powerpc.c:1575:5: error: no previous prototype for ‘kvmppc_get_vmx_byte’ [-Werror=missing-prototypes]
 1575 | int kvmppc_get_vmx_byte(struct kvm_vcpu *vcpu, int index, u64 *val)
      |     ^~~~~~~~~~~~~~~~~~~

Cc: Paul Mackerras <redacted>
Fixes: acc9eb9305fe ("KVM: PPC: Reimplement LOAD_VMX/STORE_VMX instruction mmio emulation with analyse_instr() input")
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/kvm/powerpc.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index cf52d26f49cd..25966ae3271e 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c

@@ -1518,7 +1518,7 @@ int kvmppc_handle_vmx_load(struct kvm_vcpu *vcpu,
 	return emulated;
 }
 
-int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val)
+static int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val)
 {
 	union kvmppc_one_reg reg;
 	int vmx_offset = 0;

@@ -1536,7 +1536,7 @@ int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val)
 	return result;
 }
 
-int kvmppc_get_vmx_word(struct kvm_vcpu *vcpu, int index, u64 *val)
+static int kvmppc_get_vmx_word(struct kvm_vcpu *vcpu, int index, u64 *val)
 {
 	union kvmppc_one_reg reg;
 	int vmx_offset = 0;

@@ -1554,7 +1554,7 @@ int kvmppc_get_vmx_word(struct kvm_vcpu *vcpu, int index, u64 *val)
 	return result;
 }
 
-int kvmppc_get_vmx_hword(struct kvm_vcpu *vcpu, int index, u64 *val)
+static int kvmppc_get_vmx_hword(struct kvm_vcpu *vcpu, int index, u64 *val)
 {
 	union kvmppc_one_reg reg;
 	int vmx_offset = 0;

@@ -1572,7 +1572,7 @@ int kvmppc_get_vmx_hword(struct kvm_vcpu *vcpu, int index, u64 *val)
 	return result;
 }
 
-int kvmppc_get_vmx_byte(struct kvm_vcpu *vcpu, int index, u64 *val)
+static int kvmppc_get_vmx_byte(struct kvm_vcpu *vcpu, int index, u64 *val)
 {
 	union kvmppc_one_reg reg;
 	int vmx_offset = 0;

-- 
2.26.2

It fixes these W=1 compile errors :

 CC [M]  arch/powerpc/kvm/book3s_64_mmu_hv.o
../arch/powerpc/kvm/book3s_64_mmu_hv.c:879:5: error: no previous prototype for ‘kvm_unmap_hva_range_hv’ [-Werror=missing-prototypes]
  879 | int kvm_unmap_hva_range_hv(struct kvm *kvm, unsigned long start, unsigned long end)
      |     ^~~~~~~~~~~~~~~~~~~~~~
../arch/powerpc/kvm/book3s_64_mmu_hv.c:888:6: error: no previous prototype for ‘kvmppc_core_flush_memslot_hv’ [-Werror=missing-prototypes]
  888 | void kvmppc_core_flush_memslot_hv(struct kvm *kvm,
      |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/powerpc/kvm/book3s_64_mmu_hv.c:970:5: error: no previous prototype for ‘kvm_age_hva_hv’ [-Werror=missing-prototypes]
  970 | int kvm_age_hva_hv(struct kvm *kvm, unsigned long start, unsigned long end)
      |     ^~~~~~~~~~~~~~
../arch/powerpc/kvm/book3s_64_mmu_hv.c:1011:5: error: no previous prototype for ‘kvm_test_age_hva_hv’ [-Werror=missing-prototypes]
 1011 | int kvm_test_age_hva_hv(struct kvm *kvm, unsigned long hva)
      |     ^~~~~~~~~~~~~~~~~~~
../arch/powerpc/kvm/book3s_64_mmu_hv.c:1019:6: error: no previous prototype for ‘kvm_set_spte_hva_hv’ [-Werror=missing-prototypes]
 1019 | void kvm_set_spte_hva_hv(struct kvm *kvm, unsigned long hva, pte_t pte)
      |      ^~~~~~~~~~~~~~~~~~~

Cc: Paul Mackerras <redacted>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/kvm/book3s_64_mmu_hv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index 38ea396a23d6..c77f2d4f44ca 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c

@@ -27,6 +27,7 @@
 #include <asm/cputable.h>
 #include <asm/pte-walk.h>
 
+#include "book3s.h"
 #include "trace_hv.h"
 
 //#define DEBUG_RESIZE_HPT	1

-- 
2.26.2

soft_nmi_interrupt() usage requires PPC_WATCHDOG to be configured.
Check the CONFIG definition to declare the prototype.

It fixes this W=1 compile error :

../arch/powerpc/kernel/watchdog.c:250:6: error: no previous prototype for ‘soft_nmi_interrupt’ [-Werror=missing-prototypes]
  250 | void soft_nmi_interrupt(struct pt_regs *regs)
      |      ^~~~~~~~~~~~~~~~~~

Cc: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/include/asm/nmi.h | 1 +
 arch/powerpc/kernel/watchdog.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/powerpc/include/asm/nmi.h b/arch/powerpc/include/asm/nmi.h
index 84b4cfe73edd..63eccea93796 100644
--- a/arch/powerpc/include/asm/nmi.h
+++ b/arch/powerpc/include/asm/nmi.h

@@ -4,6 +4,7 @@
 
 #ifdef CONFIG_PPC_WATCHDOG
 extern void arch_touch_nmi_watchdog(void);
+void soft_nmi_interrupt(struct pt_regs *regs);
 #else
 static inline void arch_touch_nmi_watchdog(void) {}
 #endif

diff --git a/arch/powerpc/kernel/watchdog.c b/arch/powerpc/kernel/watchdog.c
index af3c15a1d41e..3ae13c2a10cf 100644
--- a/arch/powerpc/kernel/watchdog.c
+++ b/arch/powerpc/kernel/watchdog.c

@@ -27,6 +27,7 @@
 #include <linux/smp.h>
 
 #include <asm/paca.h>
+#include <asm/nmi.h>
 
 /*
  * The powerpc watchdog ensures that each CPU is able to service timers.

-- 
2.26.2

These are only used locally. It fixes these W=1 compile errors :

../arch/powerpc/platforms/pseries/setup.c:610:17: error: no previous prototype for ‘pseries_get_iov_fw_value’ [-Werror=missing-prototypes]
  610 | resource_size_t pseries_get_iov_fw_value(struct pci_dev *dev, int resno,
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~
../arch/powerpc/platforms/pseries/setup.c:646:6: error: no previous prototype for ‘of_pci_set_vf_bar_size’ [-Werror=missing-prototypes]
  646 | void of_pci_set_vf_bar_size(struct pci_dev *dev, const int *indexes)
      |      ^~~~~~~~~~~~~~~~~~~~~~
../arch/powerpc/platforms/pseries/setup.c:668:6: error: no previous prototype for ‘of_pci_parse_iov_addrs’ [-Werror=missing-prototypes]
  668 | void of_pci_parse_iov_addrs(struct pci_dev *dev, const int *indexes)
      |      ^~~~~~~~~~~~~~~~~~~~~~

Cc: Frédéric Barrat <redacted>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/platforms/pseries/setup.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 090c13f6c881..0272aa4e74e3 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c

@@ -607,8 +607,8 @@ enum get_iov_fw_value_index {
 	WDW_SIZE      = 3     /*  Get Window Size */
 };
 
-resource_size_t pseries_get_iov_fw_value(struct pci_dev *dev, int resno,
-					 enum get_iov_fw_value_index value)
+static resource_size_t pseries_get_iov_fw_value(struct pci_dev *dev, int resno,
+						enum get_iov_fw_value_index value)
 {
 	const int *indexes;
 	struct device_node *dn = pci_device_to_OF_node(dev);

@@ -643,7 +643,7 @@ resource_size_t pseries_get_iov_fw_value(struct pci_dev *dev, int resno,
 	return ret;
 }
 
-void of_pci_set_vf_bar_size(struct pci_dev *dev, const int *indexes)
+static void of_pci_set_vf_bar_size(struct pci_dev *dev, const int *indexes)
 {
 	struct resource *res;
 	resource_size_t base, size;

@@ -665,7 +665,7 @@ void of_pci_set_vf_bar_size(struct pci_dev *dev, const int *indexes)
 	}
 }
 
-void of_pci_parse_iov_addrs(struct pci_dev *dev, const int *indexes)
+static void of_pci_parse_iov_addrs(struct pci_dev *dev, const int *indexes)
 {
 	struct resource *res, *root, *conflict;
 	resource_size_t base, size;

-- 
2.26.2

This fixes these W=1 compile errors:

../arch/powerpc/kvm/book3s_hv_builtin.c:425:6: error: no previous prototype for ‘kvmppc_read_intr’ [-Werror=missing-prototypes]
  425 | long kvmppc_read_intr(void)
      |      ^~~~~~~~~~~~~~~~
../arch/powerpc/kvm/book3s_hv_builtin.c:652:6: error: no previous prototype for ‘kvmppc_bad_interrupt’ [-Werror=missing-prototypes]
  652 | void kvmppc_bad_interrupt(struct pt_regs *regs)
      |      ^~~~~~~~~~~~~~~~~~~~
../arch/powerpc/kvm/book3s_hv_builtin.c:695:6: error: no previous prototype for ‘kvmhv_p9_set_lpcr’ [-Werror=missing-prototypes]
  695 | void kvmhv_p9_set_lpcr(struct kvm_split_mode *sip)
      |      ^~~~~~~~~~~~~~~~~
../arch/powerpc/kvm/book3s_hv_builtin.c:740:6: error: no previous prototype for ‘kvmhv_p9_restore_lpcr’ [-Werror=missing-prototypes]
  740 | void kvmhv_p9_restore_lpcr(struct kvm_split_mode *sip)
      |      ^~~~~~~~~~~~~~~~~~~~~
../arch/powerpc/kvm/book3s_hv_builtin.c:768:6: error: no previous prototype for ‘kvmppc_set_msr_hv’ [-Werror=missing-prototypes]
  768 | void kvmppc_set_msr_hv(struct kvm_vcpu *vcpu, u64 msr)
      |      ^~~~~~~~~~~~~~~~~
../arch/powerpc/kvm/book3s_hv_builtin.c:817:6: error: no previous prototype for ‘kvmppc_inject_interrupt_hv’ [-Werror=missing-prototypes]
  817 | void kvmppc_inject_interrupt_hv(struct kvm_vcpu *vcpu, int vec, u64 srr1_flags)

Cc: Paul Mackerras <redacted>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/include/asm/kvm_book3s.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h
index d32ec9ae73bd..2f5f919f6cd3 100644
--- a/arch/powerpc/include/asm/kvm_book3s.h
+++ b/arch/powerpc/include/asm/kvm_book3s.h

@@ -277,6 +277,13 @@ extern int kvmppc_hcall_impl_hv_realmode(unsigned long cmd);
 extern void kvmppc_copy_to_svcpu(struct kvm_vcpu *vcpu);
 extern void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu);
 
+long kvmppc_read_intr(void);
+void kvmppc_bad_interrupt(struct pt_regs *regs);
+void kvmhv_p9_set_lpcr(struct kvm_split_mode *sip);
+void kvmhv_p9_restore_lpcr(struct kvm_split_mode *sip);
+void kvmppc_set_msr_hv(struct kvm_vcpu *vcpu, u64 msr);
+void kvmppc_inject_interrupt_hv(struct kvm_vcpu *vcpu, int vec, u64 srr1_flags);
+
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 void kvmppc_save_tm_pr(struct kvm_vcpu *vcpu);
 void kvmppc_restore_tm_pr(struct kvm_vcpu *vcpu);

-- 
2.26.2

These are only used locally. It fixes these W=1 compile errors :

../arch/powerpc/platforms/pseries/pci.c:58:5: error: no previous prototype for ‘pseries_send_map_pe’ [-Werror=missing-prototypes]
   58 | int pseries_send_map_pe(struct pci_dev *pdev,
      |     ^~~~~~~~~~~~~~~~~~~
../arch/powerpc/platforms/pseries/pci.c:91:6: error: no previous prototype for ‘pseries_set_pe_num’ [-Werror=missing-prototypes]
   91 | void pseries_set_pe_num(struct pci_dev *pdev, u16 vf_index, __be16 pe_num)
      |      ^~~~~~~~~~~~~~~~~~
../arch/powerpc/platforms/pseries/pci.c:105:5: error: no previous prototype for ‘pseries_associate_pes’ [-Werror=missing-prototypes]
  105 | int pseries_associate_pes(struct pci_dev *pdev, u16 num_vfs)
      |     ^~~~~~~~~~~~~~~~~~~~~
../arch/powerpc/platforms/pseries/pci.c:149:5: error: no previous prototype for ‘pseries_pci_sriov_enable’ [-Werror=missing-prototypes]
  149 | int pseries_pci_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~
../arch/powerpc/platforms/pseries/pci.c:192:5: error: no previous prototype for ‘pseries_pcibios_sriov_enable’ [-Werror=missing-prototypes]
  192 | int pseries_pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/powerpc/platforms/pseries/pci.c:199:5: error: no previous prototype for ‘pseries_pcibios_sriov_disable’ [-Werror=missing-prototypes]
  199 | int pseries_pcibios_sriov_disable(struct pci_dev *pdev)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Cc: Frédéric Barrat <redacted>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/platforms/pseries/pci.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/pci.c b/arch/powerpc/platforms/pseries/pci.c
index 72a4d4167849..1bffbd1c9a94 100644
--- a/arch/powerpc/platforms/pseries/pci.c
+++ b/arch/powerpc/platforms/pseries/pci.c

@@ -55,9 +55,8 @@ struct pe_map_bar_entry {
 	__be32     reserved;  /* Reserved Space */
 };
 
-int pseries_send_map_pe(struct pci_dev *pdev,
-			u16 num_vfs,
-			struct pe_map_bar_entry *vf_pe_array)
+static int pseries_send_map_pe(struct pci_dev *pdev, u16 num_vfs,
+			       struct pe_map_bar_entry *vf_pe_array)
 {
 	struct pci_dn *pdn;
 	int rc;

@@ -88,7 +87,7 @@ int pseries_send_map_pe(struct pci_dev *pdev,
 	return rc;
 }
 
-void pseries_set_pe_num(struct pci_dev *pdev, u16 vf_index, __be16 pe_num)
+static void pseries_set_pe_num(struct pci_dev *pdev, u16 vf_index, __be16 pe_num)
 {
 	struct pci_dn *pdn;
 

@@ -102,7 +101,7 @@ void pseries_set_pe_num(struct pci_dev *pdev, u16 vf_index, __be16 pe_num)
 		pdn->pe_num_map[vf_index]);
 }
 
-int pseries_associate_pes(struct pci_dev *pdev, u16 num_vfs)
+static int pseries_associate_pes(struct pci_dev *pdev, u16 num_vfs)
 {
 	struct pci_dn *pdn;
 	int i, rc, vf_index;

@@ -146,7 +145,7 @@ int pseries_associate_pes(struct pci_dev *pdev, u16 num_vfs)
 	return rc;
 }
 
-int pseries_pci_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
+static int pseries_pci_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
 {
 	struct pci_dn         *pdn;
 	int                    rc;

@@ -189,14 +188,14 @@ int pseries_pci_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
 	return rc;
 }
 
-int pseries_pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
+static int pseries_pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
 {
 	/* Allocate PCI data */
 	add_sriov_vf_pdns(pdev);
 	return pseries_pci_sriov_enable(pdev, num_vfs);
 }
 
-int pseries_pcibios_sriov_disable(struct pci_dev *pdev)
+static int pseries_pcibios_sriov_disable(struct pci_dev *pdev)
 {
 	struct pci_dn         *pdn;
 

-- 
2.26.2

The following routines are only called by local services and do not
need to be external symbols.

It fixes these W=1 errors :

../arch/powerpc/kernel/setup_64.c:261:13: error: no previous prototype for ‘record_spr_defaults’ [-Werror=missing-prototypes]
  261 | void __init record_spr_defaults(void)
      |             ^~~~~~~~~~~~~~~~~~~
../arch/powerpc/kernel/setup_64.c:1011:6: error: no previous prototype for ‘entry_flush_enable’ [-Werror=missing-prototypes]
 1011 | void entry_flush_enable(bool enable)
      |      ^~~~~~~~~~~~~~~~~~
../arch/powerpc/kernel/setup_64.c:1023:6: error: no previous prototype for ‘uaccess_flush_enable’ [-Werror=missing-prototypes]
 1023 | void uaccess_flush_enable(bool enable)
      |      ^~~~~~~~~~~~~~~~~~~~

Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/kernel/setup_64.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index c28e949cc222..560ed8b975e7 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c

@@ -67,6 +67,7 @@
 #include <asm/kup.h>
 #include <asm/early_ioremap.h>
 #include <asm/pgalloc.h>
+#include <asm/asm-prototypes.h>
 
 #include "setup.h"
 

@@ -258,7 +259,7 @@ static void cpu_ready_for_interrupts(void)
 
 unsigned long spr_default_dscr = 0;
 
-void __init record_spr_defaults(void)
+static void __init record_spr_defaults(void)
 {
 	if (early_cpu_has_feature(CPU_FTR_DSCR))
 		spr_default_dscr = mfspr(SPRN_DSCR);

@@ -1008,7 +1009,7 @@ void rfi_flush_enable(bool enable)
 	rfi_flush = enable;
 }
 
-void entry_flush_enable(bool enable)
+static void entry_flush_enable(bool enable)
 {
 	if (enable) {
 		do_entry_flush_fixups(enabled_flush_types);

@@ -1020,7 +1021,7 @@ void entry_flush_enable(bool enable)
 	entry_flush = enable;
 }
 
-void uaccess_flush_enable(bool enable)
+static void uaccess_flush_enable(bool enable)
 {
 	if (enable) {
 		do_uaccess_flush_fixups(enabled_flush_types);

-- 
2.26.2

It fixes this W=1 compile error :

../arch/powerpc/mm/pgtable.c:337:8: error: no previous prototype for ‘__find_linux_pte’ [-Werror=missing-prototypes]
  337 | pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea,
      |        ^~~~~~~~~~~~~~~~

Cc: "Aneesh Kumar K.V" <redacted>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/mm/pgtable.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/mm/pgtable.c b/arch/powerpc/mm/pgtable.c
index 15555c95cebc..3a41545e5c07 100644
--- a/arch/powerpc/mm/pgtable.c
+++ b/arch/powerpc/mm/pgtable.c

@@ -26,6 +26,7 @@
 #include <asm/tlbflush.h>
 #include <asm/tlb.h>
 #include <asm/hugetlb.h>
+#include <asm/pte-walk.h>
 
 static inline int is_exec_fault(void)
 {

-- 
2.26.2

It fixes this W=1 compile error :

../arch/powerpc/lib/pmem.c:51:6: error: no previous prototype for ‘arch_wb_cache_pmem’ [-Werror=missing-prototypes]
   51 | void arch_wb_cache_pmem(void *addr, size_t size)
      |      ^~~~~~~~~~~~~~~~~~
../arch/powerpc/lib/pmem.c:58:6: error: no previous prototype for ‘arch_invalidate_pmem’ [-Werror=missing-prototypes]
   58 | void arch_invalidate_pmem(void *addr, size_t size)
      |      ^~~~~~~~~~~~~~~~~~~~

Fixes: 32ce3862af3c ("powerpc/lib: Implement PMEM API")
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/lib/pmem.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/lib/pmem.c b/arch/powerpc/lib/pmem.c
index 1550e0d2513a..eb2919ddf9b9 100644
--- a/arch/powerpc/lib/pmem.c
+++ b/arch/powerpc/lib/pmem.c

@@ -6,6 +6,7 @@
 #include <linux/string.h>
 #include <linux/export.h>
 #include <linux/uaccess.h>
+#include <linux/libnvdimm.h>
 
 #include <asm/cacheflush.h>
 

-- 
2.26.2

On Mon, 4 Jan 2021 15:31:43 +0100, C��dric Le Goater wrote:

Here is an assorted collection of fixes for W=1.

After this series, only a few errors are left, some missing declarations
in arch/powerpc/kernel/sys_ppc32.c, panic_smp_self_stop() declaration
and a few of these which I don't know how to fix :

  ./arch/powerpc/xmon/xmon.c: In function ���xmon_print_symbol���:
  ./arch/powerpc/xmon/xmon.c:3656:14: error: variable ���name��� might be clobbered by ���longjmp��� or ���vfork��� [-Werror=clobbered]
   3656 |  const char *name = NULL;
        |              ^~~~

[...]

Applied to powerpc/next.

[01/23] powerpc/mm: Include __find_linux_pte() prototype
        https://git.kernel.org/powerpc/c/d25da505c3f567a8667adb0118de1400468172ac
[02/23] powerpc/pseries/ras: Remove unused variable 'status'
        https://git.kernel.org/powerpc/c/aa23ea0c5f7f9a46e6aa3be0a4cfdfb80fabca6d
[03/23] powerpc/pseries/eeh: Make pseries_pcibios_bus_add_device() static
        https://git.kernel.org/powerpc/c/44159329e0ad160af7cc7e84fa6d97531c8ed78f
[04/23] powerpc/pseries/ras: Make init_ras_hotplug_IRQ() static
        https://git.kernel.org/powerpc/c/90db8bf24d133654032a1c7dd46aa5096627b9ff
[05/23] powerpc/pmem: Include pmem prototypes
        https://git.kernel.org/powerpc/c/d03f210e6ed8f5d64b00f0f07b03db74aa5b95a1
[06/23] powerpc/setup_64: Make some routines static
        https://git.kernel.org/powerpc/c/692e592895266bafb1e0d688e960b4bdd8e165a8
[07/23] powerpc/mce: Include prototypes
        https://git.kernel.org/powerpc/c/1cc2fd75934454be024cd7609b6d7890de6e724b
[08/23] powerpc/smp: Include tick_broadcast() prototype
        https://git.kernel.org/powerpc/c/cd7aa5d2fae11794a00ea34b10ee58434d718bc3
[09/23] powerpc/smp: Make debugger_ipi_callback() static
        https://git.kernel.org/powerpc/c/157c9f409d11fe79f09c69e78bfc7f8fe7410744
[10/23] powerpc/optprobes: Remove unused routine patch_imm32_load_insns()
        https://git.kernel.org/powerpc/c/d47d307f1049be545d45cf0f2332495ec9a89cc0
[11/23] powerpc/optprobes: Make patch_imm64_load_insns() static
        https://git.kernel.org/powerpc/c/bb21e1b6c5352d62d866e9236ed427f632cd537b
[12/23] powerpc/mm: Declare some prototypes
        https://git.kernel.org/powerpc/c/cccaf1a10abf03d91321d29ff333d6d5d4cef542
[13/23] powerpc/mm: Move hpte_insert_repeating() prototype
        https://git.kernel.org/powerpc/c/11f9c1d2fb497f69f83d4fab6fb7fc8a6884eded
[14/23] powerpc/mm: Declare preload_new_slb_context() prototype
        https://git.kernel.org/powerpc/c/1f55aefea3c1431f662aafa02ef9ac18d8880751
[15/23] powerpc/mm/hugetlb: Make pseries_alloc_bootmem_huge_page() static
        https://git.kernel.org/powerpc/c/94b87d72fc852b6995702d74541136a65f88624a
[16/23] powerpc/mm: Declare arch_report_meminfo() prototype.
        https://git.kernel.org/powerpc/c/1429ff51480fe5a21a3d17158d259a4b4b04808f
[17/23] powerpc/watchdog: Declare soft_nmi_interrupt() prototype
        https://git.kernel.org/powerpc/c/9ae440fb3d7d1c91ada7d6b13e009bd9f4f00e6c
[18/23] KVM: PPC: Make the VMX instruction emulation routines static
        https://git.kernel.org/powerpc/c/9236f57a9e51c72ce426ccd2e53e123de7196a0f
[19/23] KVM: PPC: Book3S HV: Include prototypes
        https://git.kernel.org/powerpc/c/d834915e8ee28884f1180dc566ba77c8768ec00a
[20/23] KVM: PPC: Book3S HV: Declare some prototypes
        https://git.kernel.org/powerpc/c/ce275179b6c98032361271927b7458884e9708b1
[21/23] powerpc/pseries: Make IOV setup routines static
        https://git.kernel.org/powerpc/c/42c1f400d1da50dd1cd9f874df72dc827f9fe2d2
[22/23] powerpc/pcidn: Make IOV setup routines static
        https://git.kernel.org/powerpc/c/53137a9b51e49e0399ad322e4a39bc5f9bf0a1de
[23/23] powerpc/pseries/eeh: Make pseries_send_allow_unfreeze() static
        https://git.kernel.org/powerpc/c/22f1de2e13b066921dedf6a00d2cc414f3cbab05

cheers