From de6b03456e2e11cbff9f4bb147177374b260d04e Mon Sep 17 00:00:00 2001 From: Chris Zankel Date: Wed, 19 Dec 2007 10:21:50 -0800 Subject: [PATCH] [XTENSA] Add volatile keyword to asm statements accessing counter registers The compiler get's sometimes to smart and doesn't reread the counter registers and the kernel doesn't schedule until the counter wraps around. Signed-off-by: Chris Zankel --- include/asm-xtensa/timex.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/include/asm-xtensa/timex.h b/include/asm-xtensa/timex.h index a5fca59fba..b83a8181d4 100644 --- a/include/asm-xtensa/timex.h +++ b/include/asm-xtensa/timex.h @@ -63,10 +63,10 @@ extern cycles_t cacheflush_time; * Register access. */ -#define WSR_CCOUNT(r) __asm__("wsr %0,"__stringify(CCOUNT) :: "a" (r)) -#define RSR_CCOUNT(r) __asm__("rsr %0,"__stringify(CCOUNT) : "=a" (r)) -#define WSR_CCOMPARE(x,r) __asm__("wsr %0,"__stringify(CCOMPARE)"+"__stringify(x) :: "a"(r)) -#define RSR_CCOMPARE(x,r) __asm__("rsr %0,"__stringify(CCOMPARE)"+"__stringify(x) : "=a"(r)) +#define WSR_CCOUNT(r) asm volatile ("wsr %0,"__stringify(CCOUNT) :: "a" (r)) +#define RSR_CCOUNT(r) asm volatile ("rsr %0,"__stringify(CCOUNT) : "=a" (r)) +#define WSR_CCOMPARE(x,r) asm volatile ("wsr %0,"__stringify(CCOMPARE)"+"__stringify(x) :: "a"(r)) +#define RSR_CCOMPARE(x,r) asm volatile ("rsr %0,"__stringify(CCOMPARE)"+"__stringify(x) : "=a"(r)) static inline unsigned long get_ccount (void) { -- 2.39.5