Use write_trylock_irqsave in ptrace_attach
This patch makes ptrace_attach use write_trylock_irqsave(). [akpm@linux-foundation.org: remove unneeded initialisation] Signed-off-by: NSripathi Kodi <sripathik@in.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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