Saves one register read. BUG=none TEST=See below.
Before (perf report): 1.40% [k] exynos4_frc_read | |--87.20%-- ktime_get_ts | | | |--93.60%-- posix_ktime_get_ts After (perf report): 1.00% [k] exynos4_frc_read | |--88.61%-- ktime_get_ts | | | |--92.70%-- posix_ktime_get_ts Signed-off-by: Mandeep Singh Baines <m...@chromium.org> CC: Sonny Rao <sonny...@chromium.org> CC: Olof Johansson <ol...@chromium.org> CC: Kukjin Kim <kgene....@samsung.com> CC: Russell King <li...@arm.linux.org.uk> CC: linux-arm-ker...@lists.infradead.org CC: linux-samsung-soc@vger.kernel.org --- arch/arm/mach-exynos/mct.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-exynos/mct.c b/arch/arm/mach-exynos/mct.c index b601fb8..2bbd533 100644 --- a/arch/arm/mach-exynos/mct.c +++ b/arch/arm/mach-exynos/mct.c @@ -128,8 +128,8 @@ static void exynos4_mct_frc_start(u32 hi, u32 lo) static cycle_t exynos4_frc_read(struct clocksource *cs) { - unsigned int lo, hi; - u32 hi2 = __raw_readl(EXYNOS4_MCT_G_CNT_U); + u32 lo, hi; + static u32 hi2; do { hi = hi2; -- 1.7.7.3 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html