aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-generic/syscall.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-generic/syscall.h')
-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 ea8087b55ffc..5c122ae6bfa6 100644
--- a/include/asm-generic/syscall.h
+++ b/include/asm-generic/syscall.h
@@ -1,7 +1,7 @@
1/* 1/*
2 * Access to user system call parameters and results 2 * Access to user system call parameters and results
3 * 3 *
4 * Copyright (C) 2008 Red Hat, Inc. All rights reserved. 4 * Copyright (C) 2008-2009 Red Hat, Inc. All rights reserved.
5 * 5 *
6 * This copyrighted material is made available to anyone wishing to use, 6 * This copyrighted material is made available to anyone wishing to use,
7 * modify, copy, or redistribute it subject to the terms and conditions 7 * modify, copy, or redistribute it subject to the terms and conditions
@@ -32,9 +32,13 @@ struct pt_regs;
32 * If @task is not executing a system call, i.e. it's blocked 32 * If @task is not executing a system call, i.e. it's blocked
33 * inside the kernel for a fault or signal, returns -1. 33 * inside the kernel for a fault or signal, returns -1.
34 * 34 *
35 * Note this returns int even on 64-bit machines. Only 32 bits of
36 * system call number can be meaningful. If the actual arch value
37 * is 64 bits, this truncates to 32 bits so 0xffffffff means -1.
38 *
35 * It's only valid to call this when @task is known to be blocked. 39 * It's only valid to call this when @task is known to be blocked.
36 */ 40 */
37long syscall_get_nr(struct task_struct *task, struct pt_regs *regs); 41int syscall_get_nr(struct task_struct *task, struct pt_regs *regs);
38 42
39/** 43/**
40 * syscall_rollback - roll back registers after an aborted system call 44 * syscall_rollback - roll back registers after an aborted system call