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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-11 11:34:55 +0100
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 20:16:00 +0200
commit2ca2a09d6215fd9621aa3e2db7cc9428a61f2911 (patch)
treea1999670bbdba36d98ba32fcca130dafcb238fd0 /init
parent411d9475cf901b5a6d2996b46cb5726184a4fa50 (diff)
downloadlinux-2ca2a09d6215fd9621aa3e2db7cc9428a61f2911.tar.gz
fs: add ksys_close() wrapper; remove in-kernel calls to sys_close()
Using the ksys_close() wrapper allows us to get rid of in-kernel calls to the sys_close() 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_close(), with one subtle difference: The few places which checked the return value did not care about the return value re-writing in sys_close(), so simply use a wrapper around __close_fd(). 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>
Diffstat (limited to 'init')
-rw-r--r--init/do_mounts.c4
-rw-r--r--init/do_mounts_initrd.c2
-rw-r--r--init/do_mounts_md.c8
-rw-r--r--init/do_mounts_rd.c6
-rw-r--r--init/initramfs.c8
5 files changed, 14 insertions, 14 deletions
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 89f18985fa90..a28dd42d1f84 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -492,7 +492,7 @@ void __init change_floppy(char *fmt, ...)
fd = sys_open("/dev/root", O_RDWR | O_NDELAY, 0);
if (fd >= 0) {
sys_ioctl(fd, FDEJECT, 0);
- sys_close(fd);
+ ksys_close(fd);
}
printk(KERN_NOTICE "VFS: Insert %s and press ENTER\n", buf);
fd = sys_open("/dev/console", O_RDWR, 0);
@@ -503,7 +503,7 @@ void __init change_floppy(char *fmt, ...)
sys_read(fd, &c, 1);
termios.c_lflag |= ICANON;
sys_ioctl(fd, TCSETSF, (long)&termios);
- sys_close(fd);
+ ksys_close(fd);
}
}
#endif
diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c
index 99922d1ebfe6..6907c6dbc443 100644
--- a/init/do_mounts_initrd.c
+++ b/init/do_mounts_initrd.c
@@ -111,7 +111,7 @@ static void __init handle_initrd(void)
error = fd;
} else {
error = sys_ioctl(fd, BLKFLSBUF, 0);
- sys_close(fd);
+ ksys_close(fd);
}
printk(!error ? "okay\n" : "failed\n");
}
diff --git a/init/do_mounts_md.c b/init/do_mounts_md.c
index 3f733c760a8c..ebd4013d589e 100644
--- a/init/do_mounts_md.c
+++ b/init/do_mounts_md.c
@@ -191,7 +191,7 @@ static void __init md_setup_drive(void)
printk(KERN_WARNING
"md: Ignoring md=%d, already autodetected. (Use raid=noautodetect)\n",
minor);
- sys_close(fd);
+ ksys_close(fd);
continue;
}
@@ -243,11 +243,11 @@ static void __init md_setup_drive(void)
* boot a kernel with devfs compiled in from partitioned md
* array without it
*/
- sys_close(fd);
+ ksys_close(fd);
fd = sys_open(name, 0, 0);
sys_ioctl(fd, BLKRRPART, 0);
}
- sys_close(fd);
+ ksys_close(fd);
}
}
@@ -297,7 +297,7 @@ static void __init autodetect_raid(void)
fd = sys_open("/dev/md0", 0, 0);
if (fd >= 0) {
sys_ioctl(fd, RAID_AUTORUN, raid_autopart);
- sys_close(fd);
+ ksys_close(fd);
}
}
diff --git a/init/do_mounts_rd.c b/init/do_mounts_rd.c
index 5b69056f610a..f1aa341862d3 100644
--- a/init/do_mounts_rd.c
+++ b/init/do_mounts_rd.c
@@ -257,7 +257,7 @@ int __init rd_load_image(char *from)
if (i && (i % devblocks == 0)) {
printk("done disk #%d.\n", disk++);
rotate = 0;
- if (sys_close(in_fd)) {
+ if (ksys_close(in_fd)) {
printk("Error closing the disk.\n");
goto noclose_input;
}
@@ -283,9 +283,9 @@ int __init rd_load_image(char *from)
successful_load:
res = 1;
done:
- sys_close(in_fd);
+ ksys_close(in_fd);
noclose_input:
- sys_close(out_fd);
+ ksys_close(out_fd);
out:
kfree(buf);
ksys_unlink("/dev/ram");
diff --git a/init/initramfs.c b/init/initramfs.c
index 0d3b001b0dc5..ce2bcad97cdf 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -373,7 +373,7 @@ static int __init do_copy(void)
if (byte_count >= body_len) {
if (xwrite(wfd, victim, body_len) != body_len)
error("write error");
- sys_close(wfd);
+ ksys_close(wfd);
do_utime(vcollected, mtime);
kfree(vcollected);
eat(body_len);
@@ -574,7 +574,7 @@ static void __init clean_rootfs(void)
buf = kzalloc(BUF_SIZE, GFP_KERNEL);
WARN_ON(!buf);
if (!buf) {
- sys_close(fd);
+ ksys_close(fd);
return;
}
@@ -602,7 +602,7 @@ static void __init clean_rootfs(void)
num = sys_getdents64(fd, dirp, BUF_SIZE);
}
- sys_close(fd);
+ ksys_close(fd);
kfree(buf);
}
#endif
@@ -639,7 +639,7 @@ static int __init populate_rootfs(void)
pr_err("/initrd.image: incomplete write (%zd != %ld)\n",
written, initrd_end - initrd_start);
- sys_close(fd);
+ ksys_close(fd);
free_initrd();
}
done: