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author | David Woodhouse <dwmw2@infradead.org> | 2007-06-27 21:10:09 (GMT) |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-06-28 18:38:30 (GMT) |
commit | edd5cd4a9424f22b0fa08bef5e299d41befd5622 (patch) | |
tree | dba461b19b066c862a2c4e443b2deb9443bc78c5 /fs | |
parent | 2f4d4da8f82c2598b8713f4a01f360f3751d90be (diff) | |
download | linux-edd5cd4a9424f22b0fa08bef5e299d41befd5622.tar.xz |
Introduce fixed sys_sync_file_range2() syscall, implement on PowerPC and ARM
Not all the world is an i386. Many architectures need 64-bit arguments to be
aligned in suitable pairs of registers, and the original
sys_sync_file_range(int, loff_t, loff_t, int) was therefore wasting an
argument register for padding after the first integer. Since we don't
normally have more than 6 arguments for system calls, that left no room for
the final argument on some architectures.
Fix this by introducing sys_sync_file_range2(int, int, loff_t, loff_t) which
all fits nicely. In fact, ARM already had that, but called it
sys_arm_sync_file_range. Move it to fs/sync.c and rename it, then implement
the needed compatibility routine. And stop the missing syscall check from
bitching about the absence of sys_sync_file_range() if we've implemented
sys_sync_file_range2() instead.
Tested on PPC32 and with 32-bit and 64-bit userspace on PPC64.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/sync.c | 8 |
1 files changed, 8 insertions, 0 deletions
@@ -236,6 +236,14 @@ out: return ret; } +/* It would be nice if people remember that not all the world's an i386 + when they introduce new system calls */ +asmlinkage long sys_sync_file_range2(int fd, unsigned int flags, + loff_t offset, loff_t nbytes) +{ + return sys_sync_file_range(fd, offset, nbytes, flags); +} + /* * `endbyte' is inclusive */ |