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

7e036d04 · Andrew Morton <[email protected]> · 2008-11-12 13:26:57 -08:00

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 <[email protected]>
Cc: Ananth N Mavinakayanahalli <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Commit: 7e036d040a28bf95255d7eb9faf0ffbba3677e99
Parents: 084c3049

Changes

1 files changed · +1 −1

File	Status	Add	Del	Content
kernel/kprobes.c	modified	+1	−1	View file

kernel/kprobes.c

View file

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index f83c5e4..9f8a3f2 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -72,7 +72,7 @@ static bool kprobe_enabled;
 DEFINE_MUTEX(kprobe_mutex);		/* Protects kprobe_table */
 static DEFINE_PER_CPU(struct kprobe *, kprobe_instance) = NULL;
 static struct {
-	spinlock_t lock ____cacheline_aligned;
+	spinlock_t lock ____cacheline_aligned_in_smp;
 } kretprobe_table_locks[KPROBE_TABLE_SIZE];
 
 static spinlock_t *kretprobe_table_lock_ptr(unsigned long hash)