Commit 7e036d04 authored Nov 12, 2008 by Andrew Morton Committed by Linus Torvalds Nov 12, 2008

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: 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>

parent 084c3049

kernel/kprobes.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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)