diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2019-07-16 16:29:53 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-07-16 19:23:24 -0700 |
| commit | b772434be0891ed1081a08ae7cfd4666728f8e82 (patch) | |
| tree | 267c8bf551cae079b00a40bd5aee9c478246e1c4 /fs/io_uring.c | |
| parent | e2d9018e81ba9357d3bb8bddc0ee58d460d092fe (diff) | |
| download | linux-b772434be0891ed1081a08ae7cfd4666728f8e82.tar.bz2 | |
signal: simplify set_user_sigmask/restore_user_sigmask
task->saved_sigmask and ->restore_sigmask are only used in the ret-from-
syscall paths. This means that set_user_sigmask() can save ->blocked in
->saved_sigmask and do set_restore_sigmask() to indicate that ->blocked
was modified.
This way the callers do not need 2 sigset_t's passed to set/restore and
restore_user_sigmask() renamed to restore_saved_sigmask_unless() turns
into the trivial helper which just calls restore_saved_sigmask().
Link: http://lkml.kernel.org/r/20190606113206.GA9464@redhat.com
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Eric Wong <e@80x24.org>
Cc: Jason Baron <jbaron@akamai.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: David Laight <David.Laight@aculab.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index d682049c07b2..e2a66e12fbc6 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -2400,7 +2400,6 @@ static int io_cqring_wait(struct io_ring_ctx *ctx, int min_events, const sigset_t __user *sig, size_t sigsz) { struct io_cq_ring *ring = ctx->cq_ring; - sigset_t ksigmask, sigsaved; int ret; if (io_cqring_events(ring) >= min_events) @@ -2410,21 +2409,17 @@ static int io_cqring_wait(struct io_ring_ctx *ctx, int min_events, #ifdef CONFIG_COMPAT if (in_compat_syscall()) ret = set_compat_user_sigmask((const compat_sigset_t __user *)sig, - &ksigmask, &sigsaved, sigsz); + sigsz); else #endif - ret = set_user_sigmask(sig, &ksigmask, - &sigsaved, sigsz); + ret = set_user_sigmask(sig, sigsz); if (ret) return ret; } ret = wait_event_interruptible(ctx->wait, io_cqring_events(ring) >= min_events); - - if (sig) - restore_user_sigmask(sig, &sigsaved, ret == -ERESTARTSYS); - + restore_saved_sigmask_unless(ret == -ERESTARTSYS); if (ret == -ERESTARTSYS) ret = -EINTR; |