Messages in this thread Patch in this message | | | From | Luis Chamberlain <> | Subject | [PATCH 4/7] sempahore: add a helper for a concurrency limiter | Date | Tue, 28 Mar 2023 22:31:46 -0700 |
| |
While I looked at re-using the old kernel/kmod.c (now kernel/module/kmod.c) concurrency delimiter methodology for another place in the kernel Linus noted that this could be simply replaced with a sempahore [0].
So add that so we we don't re-invent the wheel and make it obvious to use.
[0] https://lore.kernel.org/all/CAHk-=whkj6=wyi201JXkw9iT_eTUTsSx+Yb9d4OgmZFjDJA18g@mail.gmail.com/
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Luis Chamberlain <mcgrof@kernel.org> --- include/linux/semaphore.h | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/include/linux/semaphore.h b/include/linux/semaphore.h index 6694d0019a68..2ecdffdb9814 100644 --- a/include/linux/semaphore.h +++ b/include/linux/semaphore.h @@ -28,6 +28,9 @@ struct semaphore { #define DEFINE_SEMAPHORE(name) \ struct semaphore name = __SEMAPHORE_INITIALIZER(name, 1) +#define CONCURRENCY_LIMITER(name, n) \ + struct semaphore name = __SEMAPHORE_INITIALIZER(name, n) + static inline void sema_init(struct semaphore *sem, int val) { static struct lock_class_key __key; -- 2.39.2
| |