[PATCH v4 3/4] powerpc/64: make buildable without CONFIG_COMPAT
From: Michal Suchanek <hidden>
Date: 2019-08-29 10:23:58
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
There are numerous references to 32bit functions in generic and 64bit code so ifdef them out. Signed-off-by: Michal Suchanek <redacted> --- v2: - fix 32bit ifdef condition in signal.c - simplify the compat ifdef condition in vdso.c - 64bit is redundant - simplify the compat ifdef condition in callchain.c - 64bit is redundant v3: - use IS_ENABLED and maybe_unused where possible - do not ifdef declarations - clean up Makefile v4: - further makefile cleanup - simplify is_32bit_task conditions - avoid ifdef in condition by using return --- arch/powerpc/include/asm/thread_info.h | 4 ++-- arch/powerpc/kernel/Makefile | 7 +++---- arch/powerpc/kernel/entry_64.S | 2 ++ arch/powerpc/kernel/signal.c | 3 +-- arch/powerpc/kernel/syscall_64.c | 6 ++---- arch/powerpc/kernel/vdso.c | 5 ++--- arch/powerpc/perf/callchain.c | 14 ++++++++++---- 7 files changed, 22 insertions(+), 19 deletions(-)
diff --git a/arch/powerpc/include/asm/thread_info.h b/arch/powerpc/include/asm/thread_info.h
index 8e1d0195ac36..c128d8a48ea3 100644
--- a/arch/powerpc/include/asm/thread_info.h
+++ b/arch/powerpc/include/asm/thread_info.h@@ -144,10 +144,10 @@ static inline bool test_thread_local_flags(unsigned int flags) return (ti->local_flags & flags) != 0; } -#ifdef CONFIG_PPC64 +#ifdef CONFIG_COMPAT #define is_32bit_task() (test_thread_flag(TIF_32BIT)) #else -#define is_32bit_task() (1) +#define is_32bit_task() (IS_ENABLED(CONFIG_PPC32)) #endif #if defined(CONFIG_PPC64)
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 1d646a94d96c..9d8772e863b9 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile@@ -44,16 +44,15 @@ CFLAGS_btext.o += -DDISABLE_BRANCH_PROFILING endif obj-y := cputable.o ptrace.o syscalls.o \ - irq.o align.o signal_32.o pmc.o vdso.o \ + irq.o align.o signal_$(BITS).o pmc.o vdso.o \ process.o systbl.o idle.o \ signal.o sysfs.o cacheinfo.o time.o \ prom.o traps.o setup-common.o \ udbg.o misc.o io.o misc_$(BITS).o \ of_platform.o prom_parse.o -obj-$(CONFIG_PPC64) += setup_64.o sys_ppc32.o \ - signal_64.o ptrace32.o \ - paca.o nvram_64.o firmware.o \ +obj-$(CONFIG_PPC64) += setup_64.o paca.o nvram_64.o firmware.o \ syscall_64.o +obj-$(CONFIG_COMPAT) += sys_ppc32.o ptrace32.o signal_32.o obj-$(CONFIG_VDSO32) += vdso32/ obj-$(CONFIG_PPC_WATCHDOG) += watchdog.o obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 2ec825a85f5b..a2dbf216f607 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S@@ -51,8 +51,10 @@ SYS_CALL_TABLE: .tc sys_call_table[TC],sys_call_table +#ifdef CONFIG_COMPAT COMPAT_SYS_CALL_TABLE: .tc compat_sys_call_table[TC],compat_sys_call_table +#endif /* This value is used to mark exception frames on the stack. */ exception_marker:
diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c
index 60436432399f..61678cb0e6a1 100644
--- a/arch/powerpc/kernel/signal.c
+++ b/arch/powerpc/kernel/signal.c@@ -247,7 +247,6 @@ static void do_signal(struct task_struct *tsk) sigset_t *oldset = sigmask_to_save(); struct ksignal ksig = { .sig = 0 }; int ret; - int is32 = is_32bit_task(); BUG_ON(tsk != current);
@@ -277,7 +276,7 @@ static void do_signal(struct task_struct *tsk) rseq_signal_deliver(&ksig, tsk->thread.regs); - if (is32) { + if (is_32bit_task()) { if (ksig.ka.sa.sa_flags & SA_SIGINFO) ret = handle_rt_signal32(&ksig, oldset, tsk); else
diff --git a/arch/powerpc/kernel/syscall_64.c b/arch/powerpc/kernel/syscall_64.c
index 98ed970796d5..0d5cbbe54cf1 100644
--- a/arch/powerpc/kernel/syscall_64.c
+++ b/arch/powerpc/kernel/syscall_64.c@@ -38,7 +38,6 @@ typedef long (*syscall_fn)(long, long, long, long, long, long); long system_call_exception(long r3, long r4, long r5, long r6, long r7, long r8, unsigned long r0, struct pt_regs *regs) { - unsigned long ti_flags; syscall_fn f; BUG_ON(!(regs->msr & MSR_PR));
@@ -83,8 +82,7 @@ long system_call_exception(long r3, long r4, long r5, long r6, long r7, long r8, */ regs->softe = IRQS_ENABLED; - ti_flags = current_thread_info()->flags; - if (unlikely(ti_flags & _TIF_SYSCALL_DOTRACE)) { + if (unlikely(current_thread_info()->flags & _TIF_SYSCALL_DOTRACE)) { /* * We use the return value of do_syscall_trace_enter() as the * syscall number. If the syscall was rejected for any reason
@@ -100,7 +98,7 @@ long system_call_exception(long r3, long r4, long r5, long r6, long r7, long r8, /* May be faster to do array_index_nospec? */ barrier_nospec(); - if (unlikely(ti_flags & _TIF_32BIT)) { + if (unlikely(is_32bit_task())) { f = (void *)compat_sys_call_table[r0]; r3 &= 0x00000000ffffffffULL;
diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c
index d60598113a9f..6d4a077f74d6 100644
--- a/arch/powerpc/kernel/vdso.c
+++ b/arch/powerpc/kernel/vdso.c@@ -667,9 +667,7 @@ static void __init vdso_setup_syscall_map(void) { unsigned int i; extern unsigned long *sys_call_table; -#ifdef CONFIG_PPC64 extern unsigned long *compat_sys_call_table; -#endif extern unsigned long sys_ni_syscall;
@@ -678,7 +676,8 @@ static void __init vdso_setup_syscall_map(void) if (sys_call_table[i] != sys_ni_syscall) vdso_data->syscall_map_64[i >> 5] |= 0x80000000UL >> (i & 0x1f); - if (compat_sys_call_table[i] != sys_ni_syscall) + if (IS_ENABLED(CONFIG_COMPAT) && + compat_sys_call_table[i] != sys_ni_syscall) vdso_data->syscall_map_32[i >> 5] |= 0x80000000UL >> (i & 0x1f); #else /* CONFIG_PPC64 */
diff --git a/arch/powerpc/perf/callchain.c b/arch/powerpc/perf/callchain.c
index c84bbd4298a0..aef8c750d242 100644
--- a/arch/powerpc/perf/callchain.c
+++ b/arch/powerpc/perf/callchain.c@@ -15,7 +15,7 @@ #include <asm/sigcontext.h> #include <asm/ucontext.h> #include <asm/vdso.h> -#ifdef CONFIG_PPC64 +#ifdef CONFIG_COMPAT #include "../kernel/ppc32.h" #endif #include <asm/pte-walk.h>
@@ -165,6 +165,7 @@ static int read_user_stack_64(unsigned long __user *ptr, unsigned long *ret) return read_user_stack_slow(ptr, ret, 8); } +__maybe_unused static int read_user_stack_32(unsigned int __user *ptr, unsigned int *ret) { if ((unsigned long)ptr > TASK_SIZE - sizeof(unsigned int) ||
@@ -341,6 +342,7 @@ static inline int valid_user_sp(unsigned long sp, int is_64) #endif /* CONFIG_PPC64 */ +#if defined(CONFIG_PPC32) || defined(CONFIG_COMPAT) /* * Layout for non-RT signal frames */
@@ -482,12 +484,16 @@ static void perf_callchain_user_32(struct perf_callchain_entry_ctx *entry, sp = next_sp; } } +#endif /* 32bit */ void perf_callchain_user(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs) { - if (current_is_64bit()) - perf_callchain_user_64(entry, regs); - else +#if defined(CONFIG_PPC32) || defined(CONFIG_COMPAT) + if (!current_is_64bit()) { perf_callchain_user_32(entry, regs); + return; + } +#endif + perf_callchain_user_64(entry, regs); }
--
2.22.0