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| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-03-11 11:34:45 +0100 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-04-02 20:16:10 +0200 |
| commit | 9d5b7c956b09daab955fb2a42447d5d89ff15093 (patch) | |
| tree | f2644590e0952ce528fab32226f96557ad91b459 /arch/powerpc/kernel | |
| parent | edf292c76b884a499cc60ad5cdada2663cc39a2f (diff) | |
| download | linux-9d5b7c956b09daab955fb2a42447d5d89ff15093.tar.bz2 | |
mm: add ksys_fadvise64_64() helper; remove in-kernel call to sys_fadvise64_64()
Using the ksys_fadvise64_64() helper allows us to avoid the in-kernel
calls to the sys_fadvise64_64() 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 ksys_fadvise64_64().
Some compat stubs called sys_fadvise64(), which then just passed through
the arguments to sys_fadvise64_64(). Get rid of this indirection, and call
ksys_fadvise64_64() directly.
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 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/sys_ppc32.c | 4 | ||||
| -rw-r--r-- | arch/powerpc/kernel/syscalls.c | 4 |
2 files changed, 4 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/sys_ppc32.c b/arch/powerpc/kernel/sys_ppc32.c index 68f11e1065f8..0b95fa13307f 100644 --- a/arch/powerpc/kernel/sys_ppc32.c +++ b/arch/powerpc/kernel/sys_ppc32.c @@ -113,8 +113,8 @@ asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long h long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low, size_t len, int advice) { - return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len, - advice); + return ksys_fadvise64_64(fd, (u64)offset_high << 32 | offset_low, len, + advice); } asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags, diff --git a/arch/powerpc/kernel/syscalls.c b/arch/powerpc/kernel/syscalls.c index a877bf8269fe..ecb981eea74b 100644 --- a/arch/powerpc/kernel/syscalls.c +++ b/arch/powerpc/kernel/syscalls.c @@ -119,8 +119,8 @@ long ppc64_personality(unsigned long personality) long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low, u32 len_high, u32 len_low) { - return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, - (u64)len_high << 32 | len_low, advice); + return ksys_fadvise64_64(fd, (u64)offset_high << 32 | offset_low, + (u64)len_high << 32 | len_low, advice); } long sys_switch_endian(void) |