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authorLinus Torvalds <torvalds@linux-foundation.org>2009-09-23 08:29:57 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-23 08:29:57 -0700
commit547ad5ac665234953e32678f6a32385b58edefc3 (patch)
tree4c7aa651224d2b106a2f9da6dfb8b4233173cec2 /include/asm-generic
parent4fefce9abaeef0d6ec45e06a882db23a65135272 (diff)
parent8cb3ed13935b9b523c2de7afc8f68473fe1d4531 (diff)
Merge branch 'x86/orig_ax' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland
* 'x86/orig_ax' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland: x86: ptrace: set TS_COMPAT when 32-bit ptrace sets orig_eax>=0 x86: ptrace: do not sign-extend orig_ax on write x86: syscall_get_nr returns int asm-generic: syscall_get_nr returns int
Diffstat (limited to 'include/asm-generic')
-rw-r--r--include/asm-generic/syscall.h8
1 files changed, 6 insertions, 2 deletions
diff --git a/include/asm-generic/syscall.h b/include/asm-generic/syscall.h
index ea8087b55ff..5c122ae6bfa 100644
--- a/include/asm-generic/syscall.h
+++ b/include/asm-generic/syscall.h
@@ -1,7 +1,7 @@
/*
* Access to user system call parameters and results
*
- * Copyright (C) 2008 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2008-2009 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
@@ -32,9 +32,13 @@ struct pt_regs;
* If @task is not executing a system call, i.e. it's blocked
* inside the kernel for a fault or signal, returns -1.
*
+ * Note this returns int even on 64-bit machines. Only 32 bits of
+ * system call number can be meaningful. If the actual arch value
+ * is 64 bits, this truncates to 32 bits so 0xffffffff means -1.
+ *
* It's only valid to call this when @task is known to be blocked.
*/
-long syscall_get_nr(struct task_struct *task, struct pt_regs *regs);
+int syscall_get_nr(struct task_struct *task, struct pt_regs *regs);
/**
* syscall_rollback - roll back registers after an aborted system call