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authorOleg Nesterov <oleg@redhat.com>2019-07-16 16:29:53 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-16 19:23:24 -0700
commitb772434be0891ed1081a08ae7cfd4666728f8e82 (patch)
tree267c8bf551cae079b00a40bd5aee9c478246e1c4 /fs/io_uring.c
parente2d9018e81ba9357d3bb8bddc0ee58d460d092fe (diff)
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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.c11
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;