From a90f590a1bee36fc2129cfb38ceec24a555bb12d Mon Sep 17 00:00:00 2001 From: Dominik Brodowski Date: Sun, 11 Mar 2018 11:34:46 +0100 Subject: mm: add ksys_mmap_pgoff() helper; remove in-kernel calls to sys_mmap_pgoff() Using this helper allows us to avoid the in-kernel calls to the sys_mmap_pgoff() 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_mmap_pgoff(). 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 Cc: linux-mm@kvack.org Signed-off-by: Dominik Brodowski --- arch/sparc/kernel/sys_sparc_32.c | 6 +++--- arch/sparc/kernel/sys_sparc_64.c | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) (limited to 'arch/sparc') diff --git a/arch/sparc/kernel/sys_sparc_32.c b/arch/sparc/kernel/sys_sparc_32.c index 990703b7cf4d..d980da4ffd7b 100644 --- a/arch/sparc/kernel/sys_sparc_32.c +++ b/arch/sparc/kernel/sys_sparc_32.c @@ -104,8 +104,8 @@ asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, { /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE we have. */ - return sys_mmap_pgoff(addr, len, prot, flags, fd, - pgoff >> (PAGE_SHIFT - 12)); + return ksys_mmap_pgoff(addr, len, prot, flags, fd, + pgoff >> (PAGE_SHIFT - 12)); } asmlinkage long sys_mmap(unsigned long addr, unsigned long len, @@ -113,7 +113,7 @@ asmlinkage long sys_mmap(unsigned long addr, unsigned long len, unsigned long off) { /* no alignment check? */ - return sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); + return ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); } long sparc_remap_file_pages(unsigned long start, unsigned long size, diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c index 55416db482ad..ebb84dc8a5a7 100644 --- a/arch/sparc/kernel/sys_sparc_64.c +++ b/arch/sparc/kernel/sys_sparc_64.c @@ -458,7 +458,7 @@ SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len, goto out; if (off & ~PAGE_MASK) goto out; - retval = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); + retval = ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); out: return retval; } -- cgit v1.2.3-59-g8ed1b