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authorAlan Jenkins <alan-jenkins@tuffmail.co.uk>2009-07-29 21:07:55 +0200
committerRafael J. Wysocki <rjw@sisk.pl>2009-07-29 21:07:55 +0200
commitdddac6a7b445de95515f64fdf82fe5dc36c02f26 (patch)
tree39651610292d6b0c17f210f253a0dd16b022727d /security
parentec79be26875f6c1468784876cb99192b7f41c7a5 (diff)
PM / Hibernate: Replace bdget call with simple atomic_inc of i_count
Create bdgrab(). This function copies an existing reference to a block_device. It is safe to call from any context. Hibernation code wishes to copy a reference to the active swap device. Right now it calls bdget() under a spinlock, but this is wrong because bdget() can sleep. It doesn't need a full bdget() because we already hold a reference to active swap devices (and the spinlock protects against swapoff). Fixes http://bugzilla.kernel.org/show_bug.cgi?id=13827 Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions