Commit 7e036d04 authored by Andrew Morton's avatar Andrew Morton Committed by Linus Torvalds

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

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: default avatarMasami Hiramatsu <mhiramat@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 084c3049
...@@ -72,7 +72,7 @@ static bool kprobe_enabled; ...@@ -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)
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment