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authorDavid Woodhouse <dwmw2@infradead.org>2007-06-27 23:10:09 +0200
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-06-28 20:38:30 +0200
commitedd5cd4a9424f22b0fa08bef5e299d41befd5622 (patch)
treedba461b19b066c862a2c4e443b2deb9443bc78c5 /fs/sync.c
parentserial: clear proper MPSC interrupt cause bits (diff)
downloadlinux-edd5cd4a9424f22b0fa08bef5e299d41befd5622.tar.xz
linux-edd5cd4a9424f22b0fa08bef5e299d41befd5622.zip
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/sync.c')
-rw-r--r--fs/sync.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/sync.c b/fs/sync.c
index 2f97576355b8..7cd005ea7639 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -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
*/