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authorPeter Zijlstra <peterz@infradead.org>2023-03-29 12:14:42 +0200
committerLuis Chamberlain <mcgrof@kernel.org>2023-04-18 11:15:24 -0700
commit48380368dec14859723b9e3fbd43e042638d9a76 (patch)
tree9101bd4621e4516b4f84e9c7dda87cb71487ba7a /drivers/macintosh
parent430bb0d1c3376c988982f14bcbe71f917c89e1ab (diff)
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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/macintosh')
-rw-r--r--drivers/macintosh/adb.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/macintosh/adb.c b/drivers/macintosh/adb.c
index 23bd0c77ac1a..56599515d51a 100644
--- a/drivers/macintosh/adb.c
+++ b/drivers/macintosh/adb.c
@@ -80,7 +80,7 @@ static struct adb_driver *adb_controller;
BLOCKING_NOTIFIER_HEAD(adb_client_list);
static int adb_got_sleep;
static int adb_inited;
-static DEFINE_SEMAPHORE(adb_probe_mutex);
+static DEFINE_SEMAPHORE(adb_probe_mutex, 1);
static int sleepy_trackpad;
static int autopoll_devs;
int __adb_probe_sync;