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| author | David Howells <dhowells@redhat.com> | 2005-06-24 07:00:53 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-24 09:05:18 +0200 |
| commit | 8589b4e00e352f983259140f25a262d973be6bc5 (patch) | |
| tree | d53c9b43ee0aaa2d7518a023c4b6373422117506 /kernel/sys.c | |
| parent | [PATCH] Keys: Pass session keyring to call_usermodehelper() (diff) | |
| download | linux-8589b4e00e352f983259140f25a262d973be6bc5.tar.xz linux-8589b4e00e352f983259140f25a262d973be6bc5.zip | |
[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>
Diffstat (limited to 'kernel/sys.c')
0 files changed, 0 insertions, 0 deletions