From edd5cd4a9424f22b0fa08bef5e299d41befd5622 Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Wed, 27 Jun 2007 14:10:09 -0700 Subject: 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 Acked-by: Russell King Cc: Arnd Bergmann Cc: Paul Mackerras Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/sync.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'fs/sync.c') 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 */ -- cgit v1.2.3-55-g7522