[PATCH v2 1/6] arm64: Create sections.h
From: James Morse <james.morse@arm.com>
Date: 2016-06-15 17:35:43
Also in:
linux-arm-kernel
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
Each time new section markers are added, kernel/vmlinux.ld.S is updated, and new extern char __start_foo[] definitions are scattered through the tree. Create asm/include/sections.h to collect these definitions (and include the existing asm-generic version). Signed-off-by: James Morse <james.morse@arm.com> --- Changes since v1: * Removed text_text markers, * Sorted sections.h arch/arm64/include/asm/Kbuild | 1 - arch/arm64/include/asm/sections.h | 28 ++++++++++++++++++++++++++++ arch/arm64/include/asm/traps.h | 3 +-- arch/arm64/include/asm/virt.h | 5 +---- arch/arm64/kernel/alternative.c | 7 +++---- arch/arm64/kernel/hibernate.c | 6 ------ arch/arm64/kvm/reset.c | 3 +-- 7 files changed, 34 insertions(+), 19 deletions(-) create mode 100644 arch/arm64/include/asm/sections.h
diff --git a/arch/arm64/include/asm/Kbuild b/arch/arm64/include/asm/Kbuild
index cff532a6744e..50c1f646b704 100644
--- a/arch/arm64/include/asm/Kbuild
+++ b/arch/arm64/include/asm/Kbuild@@ -33,7 +33,6 @@ generic-y += poll.h generic-y += preempt.h generic-y += resource.h generic-y += rwsem.h -generic-y += sections.h generic-y += segment.h generic-y += sembuf.h generic-y += serial.h
diff --git a/arch/arm64/include/asm/sections.h b/arch/arm64/include/asm/sections.h
new file mode 100644
index 000000000000..cb68eb348566
--- /dev/null
+++ b/arch/arm64/include/asm/sections.h@@ -0,0 +1,28 @@ +/* + * Copyright (C) 2016 ARM Limited + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#ifndef __ASM_SECTIONS_H +#define __ASM_SECTIONS_H + +#include <asm-generic/sections.h> + +extern char __alt_instructions[], __alt_instructions_end[]; +extern char __exception_text_start[], __exception_text_end[]; +extern char __hibernate_exit_text_start[], __hibernate_exit_text_end[]; +extern char __hyp_idmap_text_start[], __hyp_idmap_text_end[]; +extern char __hyp_text_start[], __hyp_text_end[]; +extern char __idmap_text_start[], __idmap_text_end[]; + +#endif /* __ASM_SECTIONS_H */
diff --git a/arch/arm64/include/asm/traps.h b/arch/arm64/include/asm/traps.h
index 0cc2f29bf9da..90156c803f11 100644
--- a/arch/arm64/include/asm/traps.h
+++ b/arch/arm64/include/asm/traps.h@@ -19,6 +19,7 @@ #define __ASM_TRAP_H #include <linux/list.h> +#include <asm/sections.h> struct pt_regs;
@@ -52,8 +53,6 @@ static inline int __in_irqentry_text(unsigned long ptr) static inline int in_exception_text(unsigned long ptr) { - extern char __exception_text_start[]; - extern char __exception_text_end[]; int in; in = ptr >= (unsigned long)&__exception_text_start &&
diff --git a/arch/arm64/include/asm/virt.h b/arch/arm64/include/asm/virt.h
index dcbcf8dcbefb..b78611157f8b 100644
--- a/arch/arm64/include/asm/virt.h
+++ b/arch/arm64/include/asm/virt.h@@ -40,6 +40,7 @@ #ifndef __ASSEMBLY__ #include <asm/ptrace.h> +#include <asm/sections.h> /* * __boot_cpu_mode records what mode CPUs were booted in.
@@ -82,10 +83,6 @@ extern void verify_cpu_run_el(void); static inline void verify_cpu_run_el(void) {} #endif -/* The section containing the hypervisor text */ -extern char __hyp_text_start[]; -extern char __hyp_text_end[]; - #endif /* __ASSEMBLY__ */ #endif /* ! __ASM__VIRT_H */
diff --git a/arch/arm64/kernel/alternative.c b/arch/arm64/kernel/alternative.c
index d2ee1b21a10d..4434dabde898 100644
--- a/arch/arm64/kernel/alternative.c
+++ b/arch/arm64/kernel/alternative.c@@ -25,14 +25,13 @@ #include <asm/alternative.h> #include <asm/cpufeature.h> #include <asm/insn.h> +#include <asm/sections.h> #include <linux/stop_machine.h> #define __ALT_PTR(a,f) (u32 *)((void *)&(a)->f + (a)->f) #define ALT_ORIG_PTR(a) __ALT_PTR(a, orig_offset) #define ALT_REPL_PTR(a) __ALT_PTR(a, alt_offset) -extern struct alt_instr __alt_instructions[], __alt_instructions_end[]; - struct alt_region { struct alt_instr *begin; struct alt_instr *end;
@@ -124,8 +123,8 @@ static int __apply_alternatives_multi_stop(void *unused) { static int patched = 0; struct alt_region region = { - .begin = __alt_instructions, - .end = __alt_instructions_end, + .begin = (struct alt_instr *)__alt_instructions, + .end = (struct alt_instr *)__alt_instructions_end, }; /* We always have a CPU 0 at this point (__init) */
diff --git a/arch/arm64/kernel/hibernate.c b/arch/arm64/kernel/hibernate.c
index f8df75d740f4..56e548fe0386 100644
--- a/arch/arm64/kernel/hibernate.c
+++ b/arch/arm64/kernel/hibernate.c@@ -52,12 +52,6 @@ extern int in_suspend; /* Do we need to reset el2? */ #define el2_reset_needed() (is_hyp_mode_available() && !is_kernel_in_hyp_mode()) -/* - * Start/end of the hibernate exit code, this must be copied to a 'safe' - * location in memory, and executed from there. - */ -extern char __hibernate_exit_text_start[], __hibernate_exit_text_end[]; - /* temporary el2 vectors in the __hibernate_exit_text section. */ extern char hibernate_el2_vectors[];
diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c
index b1ad730e1567..c2d3594dd546 100644
--- a/arch/arm64/kvm/reset.c
+++ b/arch/arm64/kvm/reset.c@@ -32,6 +32,7 @@ #include <asm/kvm_asm.h> #include <asm/kvm_coproc.h> #include <asm/kvm_mmu.h> +#include <asm/sections.h> /* * ARMv8 Reset Values
@@ -133,8 +134,6 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu) return kvm_timer_vcpu_reset(vcpu, cpu_vtimer_irq); } -extern char __hyp_idmap_text_start[]; - unsigned long kvm_hyp_reset_entry(void) { if (!__kvm_cpu_uses_extended_idmap()) {
--
2.8.0.rc3