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 --- scripts/checksyscalls.sh | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'scripts') diff --git a/scripts/checksyscalls.sh b/scripts/checksyscalls.sh index f98171f5a3df..0dcc01ce45a6 100755 --- a/scripts/checksyscalls.sh +++ b/scripts/checksyscalls.sh @@ -99,6 +99,11 @@ cat << EOF #define __IGNORE_setfsuid32 #define __IGNORE_setfsgid32 +/* sync_file_range had a stupid ABI. Allow sync_file_range2 instead */ +#ifdef __NR_sync_file_range2 +#define __IGNORE_sync_file_range +#endif + /* Unmerged syscalls for AFS, STREAMS, etc. */ #define __IGNORE_afs_syscall #define __IGNORE_getpmsg -- cgit v1.2.3-58-ga151