diff options
| author | Roland McGrath | 2009-09-22 19:56:50 -0700 |
|---|---|---|
| committer | Roland McGrath | 2009-09-22 19:56:50 -0700 |
| commit | 268e46712d57a6493cc0f98e7d200a0f674c31ed (patch) | |
| tree | ec5c12f5fa710646482fc822b6d7d635453dd3f4 /include/asm-generic | |
| parent | 7fa07729e439a6184bd824746d06a49cca553f15 (diff) | |
asm-generic: syscall_get_nr returns int
Only 32 bits of system call number are meaningful, so make the
specification for syscall_get_nr() be to return int, not long.
Signed-off-by: Roland McGrath <roland@redhat.com>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/syscall.h | 8 |
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 @@ /* * 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 |