fs: add ksys_open() wrapper; remove in-kernel calls to sys_open()
Using this wrapper allows us to avoid the in-kernel calls to the
sys_open() syscall. The ksys_ prefix denotes that this function is meant
as a drop-in replacement for the syscall. In particular, it uses the
same calling convention as sys_open().
This patch is part of a series which removes in-kernel calls to syscalls.
On this basis, the syscall entry path can be streamlined. For details, see
http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
diff --git a/init/do_mounts_rd.c b/init/do_mounts_rd.c
index f1aa341..a670631 100644
--- a/init/do_mounts_rd.c
+++ b/init/do_mounts_rd.c
@@ -196,11 +196,11 @@ int __init rd_load_image(char *from)
char rotator[4] = { '|' , '/' , '-' , '\\' };
#endif
- out_fd = sys_open("/dev/ram", O_RDWR, 0);
+ out_fd = ksys_open("/dev/ram", O_RDWR, 0);
if (out_fd < 0)
goto out;
- in_fd = sys_open(from, O_RDONLY, 0);
+ in_fd = ksys_open(from, O_RDONLY, 0);
if (in_fd < 0)
goto noclose_input;
@@ -262,7 +262,7 @@ int __init rd_load_image(char *from)
goto noclose_input;
}
change_floppy("disk #%d", disk);
- in_fd = sys_open(from, O_RDONLY, 0);
+ in_fd = ksys_open(from, O_RDONLY, 0);
if (in_fd < 0) {
printk("Error opening disk.\n");
goto noclose_input;