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| author | Jonathan Corbet <corbet@lwn.net> | 2016-11-18 16:13:41 -0700 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2016-11-18 16:13:41 -0700 |
| commit | 917fef6f7ee8b2fe852692ac49771342bfef9433 (patch) | |
| tree | b5932aab90d449841803b6f8679a4564ca2a6eaf /arch/arm64/kernel/cpufeature.c | |
| parent | 0c9aa209579d41c9b8bf1fc39ce042bea2ec422d (diff) | |
| parent | bc33b0ca11e3df467777a4fa7639ba488c9d4911 (diff) | |
Merge tag 'v4.9-rc4' into sound
Bring in -rc4 patches so I can successfully merge the sound doc changes.
Diffstat (limited to 'arch/arm64/kernel/cpufeature.c')
| -rw-r--r-- | arch/arm64/kernel/cpufeature.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index d577f263cc4a..c02504ea304b 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -19,7 +19,9 @@ #define pr_fmt(fmt) "CPU features: " fmt #include <linux/bsearch.h> +#include <linux/cpumask.h> #include <linux/sort.h> +#include <linux/stop_machine.h> #include <linux/types.h> #include <asm/cpu.h> #include <asm/cpufeature.h> @@ -941,7 +943,13 @@ void __init enable_cpu_capabilities(const struct arm64_cpu_capabilities *caps) { for (; caps->matches; caps++) if (caps->enable && cpus_have_cap(caps->capability)) - on_each_cpu(caps->enable, NULL, true); + /* + * Use stop_machine() as it schedules the work allowing + * us to modify PSTATE, instead of on_each_cpu() which + * uses an IPI, giving us a PSTATE that disappears when + * we return. + */ + stop_machine(caps->enable, NULL, cpu_online_mask); } /* |