• Catalin Marinas's avatar
    compat: fs: Generic compat_sys_sendfile implementation · 8f9c0119
    Catalin Marinas authored
    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: default avatarCatalin Marinas <catalin.marinas@arm.com>
    Acked-by: default avatarDavid 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: default avatarAl Viro <viro@zeniv.linux.org.uk>
    8f9c0119
compat.h 21.2 KB