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| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-11 11:34:55 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:16:00 +0200 |
| commit | 2ca2a09d6215fd9621aa3e2db7cc9428a61f2911 (patch) | |
| tree | a1999670bbdba36d98ba32fcca130dafcb238fd0 /init/initramfs.c | |
| parent | fs: add ksys_ftruncate() wrapper; remove in-kernel calls to sys_ftruncate() (diff) | |
| download | linux-2ca2a09d6215fd9621aa3e2db7cc9428a61f2911.tar.xz linux-2ca2a09d6215fd9621aa3e2db7cc9428a61f2911.zip | |
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/initramfs.c')
| -rw-r--r-- | init/initramfs.c | 8 |
1 files changed, 4 insertions, 4 deletions
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: |