diff options
| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-11 11:34:41 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:15:51 +0200 |
| commit | e7a3e8b2edf544ec28f689385c3adc2903f46ec0 (patch) | |
| tree | f2fa667f8c2a6774aa466ab378a11e4c27cbd066 /init | |
| parent | a16fe33ab5572e52ef4cb9719d6eb49623b2528a (diff) | |
| download | linux-stable-e7a3e8b2edf544ec28f689385c3adc2903f46ec0.tar.gz linux-stable-e7a3e8b2edf544ec28f689385c3adc2903f46ec0.tar.bz2 linux-stable-e7a3e8b2edf544ec28f689385c3adc2903f46ec0.zip | |
fs: add ksys_write() helper; remove in-kernel calls to sys_write()
Using this helper allows us to avoid the in-kernel calls to the sys_write()
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_write().
In the near future, the do_mounts / initramfs callers of ksys_write()
should be converted to use filp_open() and vfs_write() instead.
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: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: linux-s390@vger.kernel.org
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'init')
| -rw-r--r-- | init/do_mounts_rd.c | 4 | ||||
| -rw-r--r-- | init/initramfs.c | 2 |
2 files changed, 3 insertions, 3 deletions
diff --git a/init/do_mounts_rd.c b/init/do_mounts_rd.c index 99e0b649fc0e..2d365c398ccc 100644 --- a/init/do_mounts_rd.c +++ b/init/do_mounts_rd.c @@ -270,7 +270,7 @@ int __init rd_load_image(char *from) printk("Loading disk #%d... ", disk); } sys_read(in_fd, buf, BLOCK_SIZE); - sys_write(out_fd, buf, BLOCK_SIZE); + ksys_write(out_fd, buf, BLOCK_SIZE); #if !defined(CONFIG_S390) if (!(i % 16)) { pr_cont("%c\b", rotator[rotate & 0x3]); @@ -317,7 +317,7 @@ static long __init compr_fill(void *buf, unsigned long len) static long __init compr_flush(void *window, unsigned long outcnt) { - long written = sys_write(crd_outfd, window, outcnt); + long written = ksys_write(crd_outfd, window, outcnt); if (written != outcnt) { if (decompress_error == 0) printk(KERN_ERR diff --git a/init/initramfs.c b/init/initramfs.c index 7e99a0038942..6f972df15bf2 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -27,7 +27,7 @@ static ssize_t __init xwrite(int fd, const char *p, size_t count) /* sys_write only can write MAX_RW_COUNT aka 2G-4K bytes at most */ while (count) { - ssize_t rv = sys_write(fd, p, count); + ssize_t rv = ksys_write(fd, p, count); if (rv < 0) { if (rv == -EINTR || rv == -EAGAIN) |