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authorCatalin Marinas <catalin.marinas@arm.com>2012-09-19 15:01:52 +0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-10-03 05:35:55 +0400
commit8f9c0119d7ba94c3ad13876acc240d7f12b6d8e1 (patch)
tree44d618a21b60c5a268088bfae6c78c591f1e4334 /include/linux/compat.h
parent8c0a85377048b64c880e76ec7368904fe46d0b94 (diff)
downloadlinux-8f9c0119d7ba94c3ad13876acc240d7f12b6d8e1.tar.xz
compat: fs: Generic compat_sys_sendfile implementation
This function is used by sparc, powerpc and arm64 for compat support. The patch adds a generic implementation which calls do_sendfile() directly and avoids set_fs(). The sparc architecture has wrappers for the sign extensions while powerpc relies on the compiler to do the this. The patch adds wrappers for powerpc to handle the u32->int type conversion. compat_sys_sendfile64() can be replaced by a sys_sendfile() call since compat_loff_t has the same size as off_t on a 64-bit system. On powerpc, the patch also changes the 64-bit sendfile call from sys_sendile64 to sys_sendfile. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: David S. Miller <davem@davemloft.net> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux/compat.h')
-rw-r--r--include/linux/compat.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/compat.h b/include/linux/compat.h
index 09b28b7369d7..fd4e29956d1c 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -590,6 +590,9 @@ asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
unsigned long liovcnt, const struct compat_iovec __user *rvec,
unsigned long riovcnt, unsigned long flags);
+asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
+ compat_off_t __user *offset, compat_size_t count);
+
#else
#define is_compat_task() (0)