From: Oleg Nesterov <oleg@redhat.com>
Date: Wed, 16 Dec 2009 00:47:21 +0000 (-0800)
Subject: ptrace: x86: change syscall_trace_leave() to rely on tracehook when stepping
X-Git-Tag: v2.6.33-rc1~71^2~79
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d51965037325e51f6cd68583413243c3573e47b0;p=pandora-kernel.git

ptrace: x86: change syscall_trace_leave() to rely on tracehook when stepping

Suggested by Roland.

Unlike powepc, x86 always calls tracehook_report_syscall_exit(step) with
step = 0, and sends the trap by hand.

This results in unnecessary SIGTRAP when PTRACE_SINGLESTEP follows the
syscall-exit stop.

Change syscall_trace_leave() to pass the correct "step" argument to
tracehook and remove the send_sigtrap() logic.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: <linux-arch@vger.kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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