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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-13 21:56:26 +0100
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 20:16:04 +0200
commit3ce4a7bf66263748194b77ccefd284be963c6304 (patch)
tree69ff6bec0f1186e6e4662c628449c5ced2f8b0d3 /include/linux/syscalls.h
parent76847e4344350970e1c2e27c28b5abb3c588c5b3 (diff)
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.h1
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