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| author | Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2009-04-03 01:01:21 +0900 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2009-05-14 13:50:27 +0100 |
| commit | 740ebe4a54fae1705705ec87ce511b16ffb50659 (patch) | |
| tree | f560d2d8d01c6c85108ad01ae244d5e9a4dcee25 | |
| parent | 4f29c057aa81c5440f06b716f768ba9f8a041fe9 (diff) | |
| download | blackbird-op-linux-740ebe4a54fae1705705ec87ce511b16ffb50659.tar.gz blackbird-op-linux-740ebe4a54fae1705705ec87ce511b16ffb50659.zip | |
MIPS: TXx9: Fix possible overflow in clock calculations
Addition of -fwrapv option in 2.6.29 discloses possible overflow with
signed arithmetics. For example, result of "a * 6 / 12" (int a =
400000000) is 200000000 without -fwrapv but -157913941 with -fwrapv.
Change some variable to unsigned to avoid such overflows.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| -rw-r--r-- | arch/mips/txx9/generic/setup_tx4927.c | 2 | ||||
| -rw-r--r-- | arch/mips/txx9/generic/setup_tx4938.c | 2 | ||||
| -rw-r--r-- | arch/mips/txx9/generic/setup_tx4939.c | 2 |
3 files changed, 3 insertions, 3 deletions
diff --git a/arch/mips/txx9/generic/setup_tx4927.c b/arch/mips/txx9/generic/setup_tx4927.c index 914e93c62639..1093549df1a8 100644 --- a/arch/mips/txx9/generic/setup_tx4927.c +++ b/arch/mips/txx9/generic/setup_tx4927.c @@ -88,7 +88,7 @@ void __init tx4927_setup(void) { int i; __u32 divmode; - int cpuclk = 0; + unsigned int cpuclk = 0; u64 ccfg; txx9_reg_res_init(TX4927_REV_PCODE(), TX4927_REG_BASE, diff --git a/arch/mips/txx9/generic/setup_tx4938.c b/arch/mips/txx9/generic/setup_tx4938.c index f0844f891f0b..3925219b8973 100644 --- a/arch/mips/txx9/generic/setup_tx4938.c +++ b/arch/mips/txx9/generic/setup_tx4938.c @@ -93,7 +93,7 @@ void __init tx4938_setup(void) { int i; __u32 divmode; - int cpuclk = 0; + unsigned int cpuclk = 0; u64 ccfg; txx9_reg_res_init(TX4938_REV_PCODE(), TX4938_REG_BASE, diff --git a/arch/mips/txx9/generic/setup_tx4939.c b/arch/mips/txx9/generic/setup_tx4939.c index 7a25b573e9b0..c2bf150c8838 100644 --- a/arch/mips/txx9/generic/setup_tx4939.c +++ b/arch/mips/txx9/generic/setup_tx4939.c @@ -114,7 +114,7 @@ void __init tx4939_setup(void) int i; __u32 divmode; __u64 pcfg; - int cpuclk = 0; + unsigned int cpuclk = 0; txx9_reg_res_init(TX4939_REV_PCODE(), TX4939_REG_BASE, TX4939_REG_SIZE); |
