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MIPS: TXx9: Fix possible overflow in clock calculations

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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>
This commit is contained in:
Atsushi Nemoto 2009-04-03 01:01:21 +09:00 committed by Ralf Baechle
parent 4f29c057aa
commit 740ebe4a54
3 changed files with 3 additions and 3 deletions
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2
arch/mips/txx9/generic/setup_tx4927.c
View File

@ -88,7 +88,7 @@ void __init tx4927_setup(void)
{ {
int i; int i;
__u32 divmode; __u32 divmode;
int cpuclk = 0; unsigned int cpuclk = 0;
u64 ccfg; u64 ccfg;
txx9_reg_res_init(TX4927_REV_PCODE(), TX4927_REG_BASE, txx9_reg_res_init(TX4927_REV_PCODE(), TX4927_REG_BASE,

2
arch/mips/txx9/generic/setup_tx4938.c
View File

@ -93,7 +93,7 @@ void __init tx4938_setup(void)
{ {
int i; int i;
__u32 divmode; __u32 divmode;
int cpuclk = 0; unsigned int cpuclk = 0;
u64 ccfg; u64 ccfg;
txx9_reg_res_init(TX4938_REV_PCODE(), TX4938_REG_BASE, txx9_reg_res_init(TX4938_REV_PCODE(), TX4938_REG_BASE,

2
arch/mips/txx9/generic/setup_tx4939.c
View File

@ -114,7 +114,7 @@ void __init tx4939_setup(void)
int i; int i;
__u32 divmode; __u32 divmode;
__u64 pcfg; __u64 pcfg;
int cpuclk = 0; unsigned int cpuclk = 0;
txx9_reg_res_init(TX4939_REV_PCODE(), TX4939_REG_BASE, txx9_reg_res_init(TX4939_REV_PCODE(), TX4939_REG_BASE,
TX4939_REG_SIZE); TX4939_REG_SIZE);