Commit 7190401f authored by Jiaxun Yang's avatar Jiaxun Yang Committed by Thomas Bogendoerfer
Browse files

MIPS: csrc-r4k: Apply verification clocksource flags 



CP0 counter suffers from various problems like SMP sync,
behaviour on wait.

Set CLOCK_SOURCE_MUST_VERIFY and CLOCK_SOURCE_VERIFY_PERCPU,
as what x86 did to TSC, to let kernel test it before use.

Signed-off-by: default avatarJiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: default avatarThomas Bogendoerfer <tsbogend@alpha.franken.de>
parent c171186c

arch/mips/kernel/csrc-r4k.c

+3 −1
Original line number Diff line number Diff line
@@ -21,7 +21,9 @@ static struct clocksource clocksource_mips = { 
	.name		= "MIPS",

	.read		= c0_hpt_read,

	.mask		= CLOCKSOURCE_MASK(32),

	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,

	.flags		= CLOCK_SOURCE_IS_CONTINUOUS |

				  CLOCK_SOURCE_MUST_VERIFY |

				  CLOCK_SOURCE_VERIFY_PERCPU,

};



static u64 __maybe_unused notrace r4k_read_sched_clock(void)