diff options
| author | Gerd Hoffmann <kraxel@suse.de> | 2006-07-01 04:36:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-01 09:56:02 -0700 |
| commit | 8ec4d41f88872e6a5980558e362c0174dce54e40 (patch) | |
| tree | f02eaf6b61832ded30bc19bd8e5d8494d91f8bc6 /arch/i386/kernel/alternative.c | |
| parent | 27b678dd04a636f2c351816f4b3042c8815d4e9d (diff) | |
| download | linux-8ec4d41f88872e6a5980558e362c0174dce54e40.tar.gz | |
[PATCH] SMP alternatives: skip with UP kernels
Hide the magic in alternative.h and provide some dummy inline functions
for the UP case (gcc should manage to optimize away these calls). No
changes in module.c.
Cc: Dave Jones <davej@codemonkey.org.uk>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/kernel/alternative.c')
| -rw-r--r-- | arch/i386/kernel/alternative.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/i386/kernel/alternative.c b/arch/i386/kernel/alternative.c index 50eb0e03777e4..7b421b3a053e0 100644 --- a/arch/i386/kernel/alternative.c +++ b/arch/i386/kernel/alternative.c @@ -168,6 +168,8 @@ void apply_alternatives(struct alt_instr *start, struct alt_instr *end) } } +#ifdef CONFIG_SMP + static void alternatives_smp_save(struct alt_instr *start, struct alt_instr *end) { struct alt_instr *a; @@ -328,6 +330,8 @@ void alternatives_smp_switch(int smp) spin_unlock_irqrestore(&smp_alt, flags); } +#endif + void __init alternative_instructions(void) { if (no_replacement) { @@ -349,6 +353,7 @@ void __init alternative_instructions(void) smp_alt_once = 1; #endif +#ifdef CONFIG_SMP if (smp_alt_once) { if (1 == num_possible_cpus()) { printk(KERN_INFO "SMP alternatives: switching to UP code\n"); @@ -370,4 +375,5 @@ void __init alternative_instructions(void) _text, _etext); alternatives_smp_switch(0); } +#endif } |