---

yaml --- r: 164895 b: refs/heads/master c: 18c1e2c h: refs/heads/master i: 164893: fe069f6 164891: 701d293 164887: 64f4932 164879: e4a53f6 164863: 2e05ccb v: v3
git-mirror · Sep 23, 2009 · 609f0e2 · 609f0e2
1 parent 12451af
commit 609f0e2
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Showing 2 changed files with 8 additions and 8 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 268e46712d57a6493cc0f98e7d200a0f674c31ed
+refs/heads/master: 18c1e2c80d92adca50ffc654617639a4aa35f29c
diff --git a/trunk/arch/x86/include/asm/syscall.h b/trunk/arch/x86/include/asm/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
@@ -16,13 +16,13 @@
 #include <linux/sched.h>
 #include <linux/err.h>
 
-static inline long syscall_get_nr(struct task_struct *task,
-				  struct pt_regs *regs)
+/*
+ * Only the low 32 bits of orig_ax are meaningful, so we return int.
+ * This importantly ignores the high bits on 64-bit, so comparisons
+ * sign-extend the low 32 bits.
+ */
+static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
 {
-	/*
-	 * We always sign-extend a -1 value being set here,
-	 * so this is always either -1L or a syscall number.
-	 */
 	return regs->orig_ax;
 }