[PATCH v2 1/6] arm64: Create sections.h
James Morse
james.morse at arm.com
Wed Jun 15 10:35:43 PDT 2016
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 at 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
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