signals: set_restore_sigmask TIF_SIGPENDING
authorRoland McGrath <roland@redhat.com>
Wed, 30 Apr 2008 07:53:07 +0000 (00:53 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 30 Apr 2008 15:29:37 +0000 (08:29 -0700)
commit7648d961fcb454d38e864d2d850bc30e078bf7e6
tree9a101ba3ffb61d6083654fabc05accedb3d4ef07
parent4e4c22c71144c1b2e22c257ec6cf08ccb5be1165
signals: set_restore_sigmask TIF_SIGPENDING

Set TIF_SIGPENDING in set_restore_sigmask.  This lets arch code take
TIF_RESTORE_SIGMASK out of the set of bits that will be noticed on return to
user mode.  On some machines those bits are scarce, and we can free this
unneeded one up for other uses.

It is probably the case that TIF_SIGPENDING is always set anyway everywhere
set_restore_sigmask() is used.  But this is some cheap paranoia in case there
is an arcane case where it might not be.

Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/thread_info.h