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authorIngo Molnar <mingo@elte.hu>2011-03-15 08:29:44 +0100
committerIngo Molnar <mingo@elte.hu>2011-03-15 08:29:44 +0100
commit8460b3e5bc64955aeefdd8357b3bf7b5ff79b3f2 (patch)
tree7e5f6d050b72ab08a4497e82a4a103fefb086e80 /arch/sh/lib/delay.c
parent56396e6823fe9b42fe9cf9403d6ed67756255f70 (diff)
parent521cb40b0c44418a4fd36dc633f575813d59a43d (diff)
Merge commit 'v2.6.38' into x86/mm
Conflicts: arch/x86/mm/numa_64.c Merge reason: Resolve the conflict, update the branch to .38. Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/sh/lib/delay.c')
-rw-r--r--arch/sh/lib/delay.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/sh/lib/delay.c b/arch/sh/lib/delay.c
index faa8f86c0db4..0901b2f14e15 100644
--- a/arch/sh/lib/delay.c
+++ b/arch/sh/lib/delay.c
@@ -10,6 +10,16 @@
void __delay(unsigned long loops)
{
__asm__ __volatile__(
+ /*
+ * ST40-300 appears to have an issue with this code,
+ * normally taking two cycles each loop, as with all
+ * other SH variants. If however the branch and the
+ * delay slot straddle an 8 byte boundary, this increases
+ * to 3 cycles.
+ * This align directive ensures this doesn't occur.
+ */
+ ".balign 8\n\t"
+
"tst %0, %0\n\t"
"1:\t"
"bf/s 1b\n\t"