Commit-ID: 4907c68abd3f60f650f98d5a69d4ec77c0bde44f Gitweb: https://git.kernel.org/tip/4907c68abd3f60f650f98d5a69d4ec77c0bde44f Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx> AuthorDate: Thu, 11 Oct 2018 12:38:26 +0200 Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CommitDate: Sun, 14 Oct 2018 11:11:22 +0200 x86/tsc: Force inlining of cyc2ns bits Looking at the asm for native_sched_clock() I noticed we don't inline enough. Mostly caused by sharing code with cyc2ns_read_begin(), which we didn't used to do. So mark all that __force_inline to make it DTRT. Fixes: 59eaef78bfea ("x86/tsc: Remodel cyc2ns to use seqcount_latch()") Reported-by: Eric Dumazet <edumazet@xxxxxxxxxx> Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: hpa@xxxxxxxxx Cc: eric.dumazet@xxxxxxxxx Cc: bp@xxxxxxxxx Cc: stable@xxxxxxxxxxxxxxx Link: https://lkml.kernel.org/r/20181011104019.695196158@xxxxxxxxxxxxx --- arch/x86/kernel/tsc.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c index b52bd2b6cdb4..6d5dc5dabfd7 100644 --- a/arch/x86/kernel/tsc.c +++ b/arch/x86/kernel/tsc.c @@ -58,7 +58,7 @@ struct cyc2ns { static DEFINE_PER_CPU_ALIGNED(struct cyc2ns, cyc2ns); -void cyc2ns_read_begin(struct cyc2ns_data *data) +void __always_inline cyc2ns_read_begin(struct cyc2ns_data *data) { int seq, idx; @@ -75,7 +75,7 @@ void cyc2ns_read_begin(struct cyc2ns_data *data) } while (unlikely(seq != this_cpu_read(cyc2ns.seq.sequence))); } -void cyc2ns_read_end(void) +void __always_inline cyc2ns_read_end(void) { preempt_enable_notrace(); } @@ -104,7 +104,7 @@ void cyc2ns_read_end(void) * -johnstul@xxxxxxxxxx "math is hard, lets go shopping!" */ -static inline unsigned long long cycles_2_ns(unsigned long long cyc) +static __always_inline unsigned long long cycles_2_ns(unsigned long long cyc) { struct cyc2ns_data data; unsigned long long ns;