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jump label: Make text_poke_early() globally visible

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Make text_poke_early available outside of alternative.c. The jump label
patchset wants to make use of it in order to set up the optimal no-op
sequences at run-time.

Signed-off-by: Jason Baron <jbaron@redhat.com>
LKML-Reference: <04cfddf2ba77bcabfc3e524f1849d871d6a1cf9d.1284733808.git.jbaron@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Jason Baron 2010-09-17 11:08:56 -04:00 committed by Steven Rostedt
parent f49aa44856
commit fa6f2cc770
2 changed files with 4 additions and 2 deletions
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2
arch/x86/include/asm/alternative.h
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@ -160,6 +160,8 @@ static inline void apply_paravirt(struct paravirt_patch_site *start,
#define __parainstructions_end NULL
#endif
extern void *text_poke_early(void *addr, const void *opcode, size_t len);
/*
* Clear and restore the kernel write-protection flag on the local CPU.
* Allows the kernel to edit read-only pages.

4
arch/x86/kernel/alternative.c
View file

@ -195,7 +195,7 @@ static void __init_or_module add_nops(void *insns, unsigned int len)
extern struct alt_instr __alt_instructions[], __alt_instructions_end[];
extern s32 __smp_locks[], __smp_locks_end[];
static void *text_poke_early(void *addr, const void *opcode, size_t len);
void *text_poke_early(void *addr, const void *opcode, size_t len);
/* Replace instructions with better alternatives for this CPU type.
This runs before SMP is initialized to avoid SMP problems with
@ -522,7 +522,7 @@ void __init alternative_instructions(void)
* instructions. And on the local CPU you need to be protected again NMI or MCE
* handlers seeing an inconsistent instruction while you patch.
*/
static void *__init_or_module text_poke_early(void *addr, const void *opcode,
void *__init_or_module text_poke_early(void *addr, const void *opcode,
size_t len)
{
unsigned long flags;