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| author |   Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-13 21:56:26 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:16:04 +0200 |
| commit | 3ce4a7bf66263748194b77ccefd284be963c6304 (patch) | |
| tree | 69ff6bec0f1186e6e4662c628449c5ced2f8b0d3 /include/linux/syscalls.h | |
| parent | fs: add ksys_lseek() helper; remove in-kernel calls to sys_lseek() (diff) | |
| download | linux-dev-3ce4a7bf66263748194b77ccefd284be963c6304.tar.xz linux-dev-3ce4a7bf66263748194b77ccefd284be963c6304.zip | |
fs: add ksys_read() helper; remove in-kernel calls to sys_read()
Using this helper allows us to avoid the in-kernel calls to the
sys_read() 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_read().
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>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'include/linux/syscalls.h')
| -rw-r--r-- | include/linux/syscalls.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 0f24e5334569..3a2e90842ff8 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -959,6 +959,7 @@ int ksys_getdents64(unsigned int fd, struct linux_dirent64 __user *dirent, unsigned int count); int ksys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg); off_t ksys_lseek(unsigned int fd, off_t offset, unsigned int whence); +ssize_t ksys_read(unsigned int fd, char __user *buf, size_t count); /* * The following kernel syscall equivalents are just wrappers to fs-internal |