linux-kernel - [PATCH 1/8] ptrace: forced_successful_syscall

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Message-Id: <20080319211714.8B14226F995@magilla.localdomain>
Date:	Wed, 19 Mar 2008 14:17:14 -0700 (PDT)
From:	Roland McGrath <roland@...hat.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	tony.luck@...el.com, linux-ia64@...r.kernel.org
Subject: [PATCH 1/8] ptrace: forced_successful_syscall_return() macro

This adds the forced_successful_syscall_return() macro, a mate to
force_successful_syscall_return() to test rather than set the condition.

Signed-off-by: Roland McGrath <roland@...hat.com>
---
 include/linux/ptrace.h |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index ebe0c17..9272e63 100644
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -124,8 +124,13 @@ int generic_ptrace_pokedata(struct task_struct *tsk, long addr, long data);
  * is a no-op and the spurious error condition needs to be filtered out by some
  * other means (e.g., in user-level, by passing an extra argument to the
  * syscall handler, or something along those lines).
+ *
+ * On architectures that define force_successful_syscall_return(),
+ * forced_successful_syscall_return() should also be defined.
+ * It returns nonzero if force_successful_syscall_return() was just used.
  */
 #define force_successful_syscall_return() do { } while (0)
+#define forced_successful_syscall_return() 0
 #endif
 
 /*
--
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