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Subject[PATCH 1/8] ptrace: forced_successful_syscall_return() macro
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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@redhat.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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