fs: add ksys_p{read,write}64() helpers; remove in-kernel calls to syscalls

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Using the ksys_p{read,write}64() wrappers allows us to get rid of
in-kernel calls to the sys_pread64() and sys_pwrite64() syscalls.
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_p{read,write}64().

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: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

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This commit is contained in:

Dominik Brodowski 2018-03-19 17:38:31 +01:00

parent df260e21e6

commit 36028d5dd7

9 changed files with 36 additions and 20 deletions

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include/linux/syscalls.h

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