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| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-19 17:38:31 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:16:09 +0200 |
| commit | 36028d5dd71175c332ab634e089e16dbdfe3812b (patch) | |
| tree | d25084dfe2fe7c0a070cad40333a365af076695c /arch/s390 | |
| parent | df260e21e6cd5d2dfc1fe9b6a3bbf747e72b3bed (diff) | |
| download | linux-36028d5dd71175c332ab634e089e16dbdfe3812b.tar.bz2 | |
fs: add ksys_p{read,write}64() helpers; remove in-kernel calls to syscalls
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>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kernel/compat_linux.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c index e4092ec17ea5..71e2c5bc4926 100644 --- a/arch/s390/kernel/compat_linux.c +++ b/arch/s390/kernel/compat_linux.c @@ -315,7 +315,7 @@ COMPAT_SYSCALL_DEFINE5(s390_pread64, unsigned int, fd, char __user *, ubuf, { if ((compat_ssize_t) count < 0) return -EINVAL; - return sys_pread64(fd, ubuf, count, (unsigned long)high << 32 | low); + return ksys_pread64(fd, ubuf, count, (unsigned long)high << 32 | low); } COMPAT_SYSCALL_DEFINE5(s390_pwrite64, unsigned int, fd, const char __user *, ubuf, @@ -323,7 +323,7 @@ COMPAT_SYSCALL_DEFINE5(s390_pwrite64, unsigned int, fd, const char __user *, ubu { if ((compat_ssize_t) count < 0) return -EINVAL; - return sys_pwrite64(fd, ubuf, count, (unsigned long)high << 32 | low); + return ksys_pwrite64(fd, ubuf, count, (unsigned long)high << 32 | low); } COMPAT_SYSCALL_DEFINE4(s390_readahead, int, fd, u32, high, u32, low, s32, count) |