diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2023-03-29 12:14:42 +0200 |
|---|---|---|
| committer | Luis Chamberlain <mcgrof@kernel.org> | 2023-04-18 11:15:24 -0700 |
| commit | 48380368dec14859723b9e3fbd43e042638d9a76 (patch) | |
| tree | 9101bd4621e4516b4f84e9c7dda87cb71487ba7a /drivers/platform | |
| parent | 430bb0d1c3376c988982f14bcbe71f917c89e1ab (diff) | |
Change DEFINE_SEMAPHORE() to take a number argument
Fundamentally semaphores are a counted primitive, but
DEFINE_SEMAPHORE() does not expose this and explicitly creates a
binary semaphore.
Change DEFINE_SEMAPHORE() to take a number argument and use that in the
few places that open-coded it using __SEMAPHORE_INITIALIZER().
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
[mcgrof: add some tribal knowledge about why some folks prefer
binary sempahores over mutexes]
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/x86/intel/ifs/sysfs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/platform/x86/intel/ifs/sysfs.c b/drivers/platform/x86/intel/ifs/sysfs.c index ee636a76b083..4c3c642ee19a 100644 --- a/drivers/platform/x86/intel/ifs/sysfs.c +++ b/drivers/platform/x86/intel/ifs/sysfs.c @@ -13,7 +13,7 @@ * Protects against simultaneous tests on multiple cores, or * reloading can file while a test is in progress */ -static DEFINE_SEMAPHORE(ifs_sem); +static DEFINE_SEMAPHORE(ifs_sem, 1); /* * The sysfs interface to check additional details of last test |