smpboot: fix cachesize comparison in smp_tune_scheduling()
Jarek Poplawski noted that boot_cpu_data.x86_cache_size is signed int
and can be < 0 too.
In fact we test for it. Except we assigned it to an unsigned value..
Cc: Jarek Poplawski <jarkao2@o2.pl>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Andi Kleen <ak@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c
index 08f07a7..88baed1 100644
--- a/arch/i386/kernel/smpboot.c
+++ b/arch/i386/kernel/smpboot.c
@@ -943,10 +943,9 @@
static void smp_tune_scheduling(void)
{
- unsigned long cachesize; /* kB */
-
if (cpu_khz) {
- cachesize = boot_cpu_data.x86_cache_size;
+ /* cache size in kB */
+ long cachesize = boot_cpu_data.x86_cache_size;
if (cachesize > 0)
max_cache_size = cachesize * 1024;
