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| author | Chris Metcalf <cmetcalf@tilera.com> | 2011-03-17 14:14:12 -0400 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2011-03-17 14:14:12 -0400 |
| commit | 325d1605542960903c88409b199734a3d8fc6612 (patch) | |
| tree | 9d8eeed393a3b5dcadd1ddb6b76634b464fd6bc7 /arch/sh/lib/delay.c | |
| parent | 3c5ead52ed68406c0ee789024c4ae581be8bcee4 (diff) | |
| parent | 521cb40b0c44418a4fd36dc633f575813d59a43d (diff) | |
Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into for-linus
Diffstat (limited to 'arch/sh/lib/delay.c')
| -rw-r--r-- | arch/sh/lib/delay.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/sh/lib/delay.c b/arch/sh/lib/delay.c index faa8f86c0db..0901b2f14e1 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" |