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authorDavid Woodhouse <dwmw2@infradead.org>2007-06-27 14:10:09 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-06-28 11:38:30 -0700
commitedd5cd4a9424f22b0fa08bef5e299d41befd5622 (patch)
treedba461b19b066c862a2c4e443b2deb9443bc78c5 /include
parent2f4d4da8f82c2598b8713f4a01f360f3751d90be (diff)
downloadlinux-stericsson-edd5cd4a9424f22b0fa08bef5e299d41befd5622.tar.gz
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 'include')
-rw-r--r--include/asm-arm/unistd.h1
-rw-r--r--include/asm-powerpc/systbl.h1
-rw-r--r--include/asm-powerpc/unistd.h3
-rw-r--r--include/linux/syscalls.h2
4 files changed, 6 insertions, 1 deletions
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);