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| author | Dominik Brodowski | 2018-03-19 17:51:36 +0100 |
|---|---|---|
| committer | Dominik Brodowski | 2018-04-02 20:16:12 +0200 |
| commit | c7b95d5156a9ee70f800bd2e47a9eba677be73e1 (patch) | |
| tree | a6f4b1d0d4bc5f9be4665034f8cadcce6ac472c5 /include/linux/syscalls.h | |
| parent | mm: add ksys_mmap_pgoff() helper; remove in-kernel calls to sys_mmap_pgoff() (diff) | |
| download | kernel-qcow2-linux-c7b95d5156a9ee70f800bd2e47a9eba677be73e1.tar.gz kernel-qcow2-linux-c7b95d5156a9ee70f800bd2e47a9eba677be73e1.tar.xz kernel-qcow2-linux-c7b95d5156a9ee70f800bd2e47a9eba677be73e1.zip | |
mm: add ksys_readahead() helper; remove in-kernel calls to sys_readahead()
Using this helper allows us to avoid the in-kernel calls to the
sys_readahead() 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_readahead().
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: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org
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 ec866c959e7d..815fbdd9cca1 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -982,6 +982,7 @@ static inline int ksys_fadvise64_64(int fd, loff_t offset, loff_t len, unsigned long ksys_mmap_pgoff(unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags, unsigned long fd, unsigned long pgoff); +ssize_t ksys_readahead(int fd, loff_t offset, size_t count); /* * The following kernel syscall equivalents are just wrappers to fs-internal |