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authorDavid Howells <dhowells@redhat.com>2005-06-23 22:00:53 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-24 00:05:18 -0700
commit8589b4e00e352f983259140f25a262d973be6bc5 (patch)
treed53c9b43ee0aaa2d7518a023c4b6373422117506 /security/capability.c
parent7888e7ff4ee579442128d7d12a9c9dbf2cf7de6a (diff)
downloadlinux-sh-8589b4e00e352f983259140f25a262d973be6bc5.tar.gz
[PATCH] Keys: Use RCU to manage session keyring pointer
The attached patch uses RCU to manage the session keyring pointer in struct signal_struct. This means that searching need not disable interrupts and get a the sighand spinlock to access this pointer. Furthermore, by judicious use of rcu_read_(un)lock(), this patch also avoids the need to take and put refcounts on the session keyring itself, thus saving on even more atomic ops. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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