diff options
| author | Catalin Marinas <catalin.marinas@arm.com> | 2012-12-17 16:01:45 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-17 17:15:18 -0800 |
| commit | 0ad50c3896afbb3c103409a18260e601b87a744c (patch) | |
| tree | 3a59c1e90b3ee62daf18bc9689cf454a31f164be /kernel | |
| parent | 918854a65e856574523d94763ef2a2b48ad55a25 (diff) | |
| download | linux-0ad50c3896afbb3c103409a18260e601b87a744c.tar.bz2 | |
compat: generic compat_sys_sched_rr_get_interval() implementation
This function is used by sparc, powerpc tile and arm64 for compat support.
The patch adds a generic implementation with a wrapper for PowerPC to do
the u32->int sign extension.
The reason for a single patch covering powerpc, tile, sparc and arm64 is
to keep it bisectable, otherwise kernel building may fail with mismatched
function declarations.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Chris Metcalf <cmetcalf@tilera.com> [for tile]
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/compat.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/kernel/compat.c b/kernel/compat.c index c28a306ae05c..f6150e92dfc9 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -1215,6 +1215,23 @@ compat_sys_sysinfo(struct compat_sysinfo __user *info) return 0; } +#ifdef __ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL +asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, + struct compat_timespec __user *interval) +{ + struct timespec t; + int ret; + mm_segment_t old_fs = get_fs(); + + set_fs(KERNEL_DS); + ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t); + set_fs(old_fs); + if (put_compat_timespec(&t, interval)) + return -EFAULT; + return ret; +} +#endif /* __ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL */ + /* * Allocate user-space memory for the duration of a single system call, * in order to marshall parameters inside a compat thunk. |