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authorLinus Torvalds <torvalds@linux-foundation.org>2012-04-20 17:13:58 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-04-20 17:29:13 -0700
commit6be5ceb02e98eaf6cfc4f8b12a896d04023f340d (patch)
treef34de1392300bbf63549f4eeb20f7606d6f7b1f9 /arch/tile
parenta46ef99d80817a167477ed1c8b4d90ee0c2e726f (diff)
VM: add "vm_mmap()" helper function
This continues the theme started with vm_brk() and vm_munmap(): vm_mmap() does the same thing as do_mmap(), but additionally does the required VM locking. This uninlines (and rewrites it to be clearer) do_mmap(), which sadly duplicates it in mm/mmap.c and mm/nommu.c. But that way we don't have to export our internal do_mmap_pgoff() function. Some day we hopefully don't have to export do_mmap() either, if all modular users can become the simpler vm_mmap() instead. We're actually very close to that already, with the notable exception of the (broken) use in i810, and a couple of stragglers in binfmt_elf. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/tile')
-rw-r--r--arch/tile/kernel/single_step.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/tile/kernel/single_step.c b/arch/tile/kernel/single_step.c
index 9efbc1391b3c..89529c9f0605 100644
--- a/arch/tile/kernel/single_step.c
+++ b/arch/tile/kernel/single_step.c
@@ -346,12 +346,10 @@ void single_step_once(struct pt_regs *regs)
}
/* allocate a cache line of writable, executable memory */
- down_write(&current->mm->mmap_sem);
- buffer = (void __user *) do_mmap(NULL, 0, 64,
+ buffer = (void __user *) vm_mmap(NULL, 0, 64,
PROT_EXEC | PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS,
0);
- up_write(&current->mm->mmap_sem);
if (IS_ERR((void __force *)buffer)) {
kfree(state);