OpenCloudOS-Kernel/net/unix
Rainer Weikusat 3822b5c2fc af_unix: Revert 'lock_interruptible' in stream receive code
With b3ca9b02b0, the AF_UNIX SOCK_STREAM
receive code was changed from using mutex_lock(&u->readlock) to
mutex_lock_interruptible(&u->readlock) to prevent signals from being
delayed for an indefinite time if a thread sleeping on the mutex
happened to be selected for handling the signal. But this was never a
problem with the stream receive code (as opposed to its datagram
counterpart) as that never went to sleep waiting for new messages with the
mutex held and thus, wouldn't cause secondary readers to block on the
mutex waiting for the sleeping primary reader. As the interruptible
locking makes the code more complicated in exchange for no benefit,
change it back to using mutex_lock.

Signed-off-by: Rainer Weikusat <rweikusat@mobileactivedefense.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-17 15:33:47 -05:00
..
Kconfig net: Default UDP and UNIX diag to 'n'. 2012-01-07 12:13:06 -08:00
Makefile unix_diag: Write it into kbuild 2011-12-16 13:48:29 -05:00
af_unix.c af_unix: Revert 'lock_interruptible' in stream receive code 2015-12-17 15:33:47 -05:00
diag.c VFS: net/unix: d_backing_inode() annotations 2015-04-15 15:06:56 -04:00
garbage.c net: unix: garbage: fixed several comment and whitespace style issues 2015-04-23 13:15:20 -04:00
sysctl_net_unix.c net: Convert uses of typedef ctl_table to struct ctl_table 2013-06-13 02:36:09 -07:00