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| author | Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2018-04-19 12:34:04 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-05-03 22:32:27 +1000 |
| commit | 424ef0160f439feb2a1a6e796a281e2bfa7b6997 (patch) | |
| tree | 2be23c1609e1e94cc9e873ff055fbcafade693f2 /arch/powerpc/kernel/smp.c | |
| parent | d103978636c27fce216bbc8bb289981047b71bd4 (diff) | |
| download | linux-424ef0160f439feb2a1a6e796a281e2bfa7b6997.tar.bz2 | |
powerpc64/ftrace: Disable ftrace during hotplug
Disable ftrace when a cpu is about to go offline. When the cpu is woken
up, ftrace will get enabled in start_secondary().
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/smp.c')
| -rw-r--r-- | arch/powerpc/kernel/smp.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 9e711cdbe384..c96f8fbc1942 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -1166,6 +1166,8 @@ int __cpu_disable(void) if (!smp_ops->cpu_disable) return -ENOSYS; + this_cpu_disable_ftrace(); + err = smp_ops->cpu_disable(); if (err) return err; @@ -1184,6 +1186,12 @@ void __cpu_die(unsigned int cpu) void cpu_die(void) { + /* + * Disable on the down path. This will be re-enabled by + * start_secondary() via start_secondary_resume() below + */ + this_cpu_disable_ftrace(); + if (ppc_md.cpu_die) ppc_md.cpu_die(); |