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sh: Fix underflow in SH udelay() code.

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Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Stuart Menefy 2009-08-24 18:18:50 +09:00 committed by Paul Mundt
parent 6d243dd370
commit bd4fb4d4c1
1 changed files with 3 additions and 2 deletions
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5
arch/sh/lib/delay.c
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@ -21,13 +21,14 @@ void __delay(unsigned long loops)
inline void __const_udelay(unsigned long xloops) inline void __const_udelay(unsigned long xloops)
{ {
xloops *= 4;
__asm__("dmulu.l %0, %2\n\t" __asm__("dmulu.l %0, %2\n\t"
"sts mach, %0" "sts mach, %0"
: "=r" (xloops) : "=r" (xloops)
: "0" (xloops), : "0" (xloops),
"r" (HZ * cpu_data[raw_smp_processor_id()].loops_per_jiffy) "r" (cpu_data[raw_smp_processor_id()].loops_per_jiffy * (HZ/4))
: "macl", "mach"); : "macl", "mach");
__delay(xloops); __delay(++xloops);
} }
void __udelay(unsigned long usecs) void __udelay(unsigned long usecs)