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author | Ingo Molnar <mingo@elte.hu> | 2011-03-09 04:38:55 -0500 |
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committer | Ingo Molnar <mingo@elte.hu> | 2011-03-09 04:38:59 -0500 |
commit | c8b44163b754612fc4769fe1c5df00e98fc9d3c6 (patch) | |
tree | 77706ff1f2a72ed294885b6cf0a7c0de0f92d6df /arch/sh/lib/delay.c | |
parent | ac23f25355ef53f3d14352fcff3c6817527a9749 (diff) | |
parent | a5abba989deceb731047425812d268daf7536575 (diff) |
Merge commit 'v2.6.38-rc8' into x86/asm
Merge reason: Update with the latest fixes.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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 faa8f86c0db4..0901b2f14e15 100644 --- a/arch/sh/lib/delay.c +++ b/arch/sh/lib/delay.c | |||
@@ -10,6 +10,16 @@ | |||
10 | void __delay(unsigned long loops) | 10 | void __delay(unsigned long loops) |
11 | { | 11 | { |
12 | __asm__ __volatile__( | 12 | __asm__ __volatile__( |
13 | /* | ||
14 | * ST40-300 appears to have an issue with this code, | ||
15 | * normally taking two cycles each loop, as with all | ||
16 | * other SH variants. If however the branch and the | ||
17 | * delay slot straddle an 8 byte boundary, this increases | ||
18 | * to 3 cycles. | ||
19 | * This align directive ensures this doesn't occur. | ||
20 | */ | ||
21 | ".balign 8\n\t" | ||
22 | |||
13 | "tst %0, %0\n\t" | 23 | "tst %0, %0\n\t" |
14 | "1:\t" | 24 | "1:\t" |
15 | "bf/s 1b\n\t" | 25 | "bf/s 1b\n\t" |