| Message ID | 20180321094639.25565-1-m.szyprowski@samsung.com |
|---|---|
| State | New |
| Headers | show |
| Series | ARM: EXYNOS: Simplify code in coupled CPU idle hot path | expand |
On Wednesday, March 21, 2018 10:46:39 AM Marek Szyprowski wrote: > exynos_enter_aftr() is called by coupled CPU idle code every time CPU > enters idle state, what can be considered as a hot path. Replace > of_machine_is_compatible() call with a simple SoC revision check. > > of_machine_is_compatible() function performs a dozen of string comparisons > during the full device tree walk, while soc_is_exynos4412() is a simple > integer check on SoC revision variable. > > Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Best regards, -- Bartlomiej Zolnierkiewicz Samsung R&D Institute Poland Samsung Electronics -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Wed, Mar 21, 2018 at 10:46:39AM +0100, Marek Szyprowski wrote: > exynos_enter_aftr() is called by coupled CPU idle code every time CPU > enters idle state, what can be considered as a hot path. Replace > of_machine_is_compatible() call with a simple SoC revision check. > > of_machine_is_compatible() function performs a dozen of string comparisons > during the full device tree walk, while soc_is_exynos4412() is a simple > integer check on SoC revision variable. > > Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> > --- > arch/arm/mach-exynos/pm.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > Thanks, applied. Best regards, Krzysztof -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c index a1055a2b8d54..a822c5073715 100644 --- a/arch/arm/mach-exynos/pm.c +++ b/arch/arm/mach-exynos/pm.c @@ -163,7 +163,7 @@ void exynos_enter_aftr(void) exynos_pm_central_suspend(); - if (of_machine_is_compatible("samsung,exynos4412")) { + if (soc_is_exynos4412()) { /* Setting SEQ_OPTION register */ pmu_raw_writel(S5P_USE_STANDBY_WFI0 | S5P_USE_STANDBY_WFE0, S5P_CENTRAL_SEQ_OPTION);
exynos_enter_aftr() is called by coupled CPU idle code every time CPU enters idle state, what can be considered as a hot path. Replace of_machine_is_compatible() call with a simple SoC revision check. of_machine_is_compatible() function performs a dozen of string comparisons during the full device tree walk, while soc_is_exynos4412() is a simple integer check on SoC revision variable. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> --- arch/arm/mach-exynos/pm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- 2.15.0 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html