diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2018-11-25 19:33:38 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-05 19:41:20 +0100 |
| commit | 0e797117f18573ab31f72aed0924ff7999d860ea (patch) | |
| tree | 5c898a8dd7af162ff4cc3cc3e09ee8021833be70 /kernel/sched | |
| parent | 44ac7cd01544dd12241bc0c0e0eb5604ad77379a (diff) | |
sched/smt: Expose sched_smt_present static key
commit 321a874a7ef85655e93b3206d0f36b4a6097f948 upstream
Make the scheduler's 'sched_smt_present' static key globaly available, so
it can be used in the x86 speculation control code.
Provide a query function and a stub for the CONFIG_SMP=n case.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Woodhouse <dwmw@amazon.co.uk>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Casey Schaufler <casey.schaufler@intel.com>
Cc: Asit Mallick <asit.k.mallick@intel.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Jon Masters <jcm@redhat.com>
Cc: Waiman Long <longman9394@gmail.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: Dave Stewart <david.c.stewart@intel.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20181125185004.430168326@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/sched.h | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 63d999dfec80..b3ba6e5e99f2 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -20,6 +20,7 @@ #include <linux/sched/task_stack.h> #include <linux/sched/cputime.h> #include <linux/sched/init.h> +#include <linux/sched/smt.h> #include <linux/u64_stats_sync.h> #include <linux/kernel_stat.h> @@ -825,9 +826,6 @@ static inline int cpu_of(struct rq *rq) #ifdef CONFIG_SCHED_SMT - -extern struct static_key_false sched_smt_present; - extern void __update_idle_core(struct rq *rq); static inline void update_idle_core(struct rq *rq) |