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jump label: Make dynamic no-op selection available outside of ftrace

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Move Steve's code for finding the best 5-byte no-op from ftrace.c to
alternative.c. The idea is that other consumers (in this case jump label)
want to make use of that code.

Signed-off-by: Jason Baron <jbaron@redhat.com>
LKML-Reference: <96259ae74172dcac99c0020c249743c523a92e18.1284733808.git.jbaron@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Jason Baron
2010-09-17 11:08:51 -04:00
committed by Steven Rostedt
parent e9d2b06414
commit f49aa44856
4 changed files with 79 additions and 62 deletions
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8
arch/x86/include/asm/alternative.h
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@@ -180,4 +180,12 @@ static inline void apply_paravirt(struct paravirt_patch_site *start,
extern void *text_poke(void *addr, const void *opcode, size_t len);
extern void *text_poke_smp(void *addr, const void *opcode, size_t len);
#if defined(CONFIG_DYNAMIC_FTRACE)
#define IDEAL_NOP_SIZE_5 5
extern unsigned char ideal_nop5[IDEAL_NOP_SIZE_5];
extern void arch_init_ideal_nop5(void);
#else
static inline void arch_init_ideal_nop5(void) {}
#endif
#endif /* _ASM_X86_ALTERNATIVE_H */