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ef8ac06359
There are cases where read_seqbegin_or_lock() needs to block irqs, because the seqlock in question nests inside a lock that is also be taken from irq context. Add read_seqbegin_or_lock_irqsave() and done_seqretry_irqrestore(), which are almost identical to read_seqbegin_or_lock() and done_seqretry(). Signed-off-by: Rik van Riel <riel@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: prarit@redhat.com Cc: oleg@redhat.com Cc: sgruszka@redhat.com Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: John Stultz <john.stultz@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Trond Myklebust <trond.myklebust@primarydata.com> Link: http://lkml.kernel.org/r/1410527535-9814-2-git-send-email-riel@redhat.com [ Improved the readability of the code a bit. ] Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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