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| author | Peter Hurley <peter@hurleysoftware.com> | 2014-10-16 21:33:26 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-06 01:34:36 +0100 |
| commit | 54e8e5fcaae109f0303f52efb24f29bfac79ca86 (patch) | |
| tree | d0d4e39526384367fa195b61a5aa2de686170a7d /security | |
| parent | tty: Use spin_lock_irq() for ctrl_lock when interrupts enabled (diff) | |
| download | linux-54e8e5fcaae109f0303f52efb24f29bfac79ca86.tar.xz linux-54e8e5fcaae109f0303f52efb24f29bfac79ca86.zip | |
pty: Don't claim slave's ctrl_lock for master's packet mode
The slave's ctrl_lock serializes updates to the ctrl_status field
only, whereas the master's ctrl_lock serializes updates to the
packet mode enable (ie., the master does not have ctrl_status and
the slave does not have packet mode). Thus, claiming the slave's
ctrl_lock to access ->packet is useless.
Unlocked reads of ->packet are already smp-safe.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Reviewed-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions