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 --- arch/arm/kernel/calls.S | 2 +- arch/arm/kernel/sys_arm.c | 13 ------------- 2 files changed, 1 insertion(+), 14 deletions(-) (limited to 'arch/arm/kernel') diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S index 19326d7..a98d0c9 100644 --- a/arch/arm/kernel/calls.S +++ b/arch/arm/kernel/calls.S @@ -350,7 +350,7 @@ CALL(sys_set_robust_list) CALL(sys_get_robust_list) /* 340 */ CALL(sys_splice) - CALL(sys_arm_sync_file_range) + CALL(sys_sync_file_range2) CALL(sys_tee) CALL(sys_vmsplice) CALL(sys_move_pages) diff --git a/arch/arm/kernel/sys_arm.c b/arch/arm/kernel/sys_arm.c index 1ca2d51..4d25e49 100644 --- a/arch/arm/kernel/sys_arm.c +++ b/arch/arm/kernel/sys_arm.c @@ -328,16 +328,3 @@ asmlinkage long sys_arm_fadvise64_64(int fd, int advice, { return sys_fadvise64_64(fd, offset, len, advice); } - -/* - * Yet more syscall fsckage - we can't fit sys_sync_file_range's - * arguments into the available registers with EABI. So, let's - * create an ARM specific syscall for this which has _sane_ - * arguments. (This incidentally also has an ABI-independent - * argument layout.) - */ -asmlinkage long sys_arm_sync_file_range(int fd, unsigned int flags, - loff_t offset, loff_t nbytes) -{ - return sys_sync_file_range(fd, offset, nbytes, flags); -} -- cgit v1.1