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author | David S. Miller <davem@davemloft.net> | 2011-03-10 17:26:00 -0500 |
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committer | David S. Miller <davem@davemloft.net> | 2011-03-10 17:26:00 -0500 |
commit | 33175d84ee3fa29991adb80513683e010769e807 (patch) | |
tree | 3731f61cf82451b6892cf1368701e57e35d92908 /arch/sh/lib/delay.c | |
parent | c5908939b2738bafe1b309bc2465cb9f2e6184c5 (diff) | |
parent | 6dfbd87a20a737641ef228230c77f4262434fa24 (diff) |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:
drivers/net/bnx2x/bnx2x_cmn.c
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" |