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kernel/kprobes.c: don't pad kretprobe_table_locks[] on uniprocessor builds

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We only need the cacheline padding on SMP kernels.  Saves 6k:

   text    data     bss     dec     hex filename
   5713     388    8840   14941    3a5d kernel/kprobes.o
   5713     388    2632    8733    221d kernel/kprobes.o

Acked-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrew Morton 2008-11-12 13:26:57 -08:00 committed by Linus Torvalds
parent 084c304980
commit 7e036d040a
1 changed files with 1 additions and 1 deletions
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2
kernel/kprobes.c
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@ -72,7 +72,7 @@ static bool kprobe_enabled;
DEFINE_MUTEX(kprobe_mutex); /* Protects kprobe_table */ DEFINE_MUTEX(kprobe_mutex); /* Protects kprobe_table */
static DEFINE_PER_CPU(struct kprobe *, kprobe_instance) = NULL; static DEFINE_PER_CPU(struct kprobe *, kprobe_instance) = NULL;
static struct { static struct {
spinlock_t lock ____cacheline_aligned; spinlock_t lock ____cacheline_aligned_in_smp;
} kretprobe_table_locks[KPROBE_TABLE_SIZE]; } kretprobe_table_locks[KPROBE_TABLE_SIZE];
static spinlock_t *kretprobe_table_lock_ptr(unsigned long hash) static spinlock_t *kretprobe_table_lock_ptr(unsigned long hash)