From: David S. Miller <davem@davemloft.net>
Date: Sun, 27 Apr 2008 21:54:02 +0000 (-0700)
Subject: sparc64: Fix accidental syscall restart on child return from clone/fork/vfork.
X-Git-Tag: v2.6.26-rc1~714^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fd7354108aa5497d7177b95a6b157eaf8597d621;p=pandora-kernel.git

sparc64: Fix accidental syscall restart on child return from clone/fork/vfork.

This fixes a regression added by
238468b2ac76020c192a7402c92df5097916bf4a ("[SPARC64]: Use trap type
stored in pt_regs to handle syscall restart.")

Because we now encode the "returning from syscall" status in the
pt_regs area, we have to be mindful to zap it out in the child
of a fork.

During a parallel kernel build I saw an accidental -EINTR return
from vfork() in 'make' because of this bug.

Signed-off-by: David S. Miller <davem@davemloft.net>
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