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 --- include/asm-arm/unistd.h | 1 + include/asm-powerpc/systbl.h | 1 + include/asm-powerpc/unistd.h | 3 ++- include/linux/syscalls.h | 2 ++ 4 files changed, 6 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/asm-arm/unistd.h b/include/asm-arm/unistd.h index 250d7f145aca..bfdbebebdc1b 100644 --- a/include/asm-arm/unistd.h +++ b/include/asm-arm/unistd.h @@ -367,6 +367,7 @@ #define __NR_get_robust_list (__NR_SYSCALL_BASE+339) #define __NR_splice (__NR_SYSCALL_BASE+340) #define __NR_arm_sync_file_range (__NR_SYSCALL_BASE+341) +#define __NR_sync_file_range2 __NR_arm_sync_file_range #define __NR_tee (__NR_SYSCALL_BASE+342) #define __NR_vmsplice (__NR_SYSCALL_BASE+343) #define __NR_move_pages (__NR_SYSCALL_BASE+344) diff --git a/include/asm-powerpc/systbl.h b/include/asm-powerpc/systbl.h index 700ca5928741..1cc3f9cb6f4e 100644 --- a/include/asm-powerpc/systbl.h +++ b/include/asm-powerpc/systbl.h @@ -311,3 +311,4 @@ COMPAT_SYS_SPU(utimensat) COMPAT_SYS_SPU(signalfd) COMPAT_SYS_SPU(timerfd) SYSCALL_SPU(eventfd) +COMPAT_SYS_SPU(sync_file_range2) diff --git a/include/asm-powerpc/unistd.h b/include/asm-powerpc/unistd.h index e3c28dc31abf..f71c6061f1ec 100644 --- a/include/asm-powerpc/unistd.h +++ b/include/asm-powerpc/unistd.h @@ -330,10 +330,11 @@ #define __NR_signalfd 305 #define __NR_timerfd 306 #define __NR_eventfd 307 +#define __NR_sync_file_range2 308 #ifdef __KERNEL__ -#define __NR_syscalls 308 +#define __NR_syscalls 309 #define __NR__exit __NR_exit #define NR_syscalls __NR_syscalls diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index b02070eac422..83d0ec11235e 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -598,6 +598,8 @@ asmlinkage long sys_tee(int fdin, int fdout, size_t len, unsigned int flags); asmlinkage long sys_sync_file_range(int fd, loff_t offset, loff_t nbytes, unsigned int flags); +asmlinkage long sys_sync_file_range2(int fd, unsigned int flags, + loff_t offset, loff_t nbytes); asmlinkage long sys_get_robust_list(int pid, struct robust_list_head __user * __user *head_ptr, size_t __user *len_ptr); -- cgit v1.2.3