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authorDominik Brodowski <linux@dominikbrodowski.net>2018-03-19 17:51:36 +0100
committerDominik Brodowski <linux@dominikbrodowski.net>2018-04-02 20:16:12 +0200
commitc7b95d5156a9ee70f800bd2e47a9eba677be73e1 (patch)
treea6f4b1d0d4bc5f9be4665034f8cadcce6ac472c5 /include
parenta90f590a1bee36fc2129cfb38ceec24a555bb12d (diff)
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')
-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 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