lkml.org 
[lkml]   [2018]   [Feb]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 15/64] ipc: use mm locking wrappers
Date
From: Davidlohr Bueso <dave@stgolabs.net>

This is straightforward as the necessary syscalls already
know about mmrange. No change in semantics.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
---
ipc/shm.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/ipc/shm.c b/ipc/shm.c
index 6c29c791c7f2..4ab752647ca9 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -1398,7 +1398,7 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg,
if (err)
goto out_fput;

- if (down_write_killable(&current->mm->mmap_sem)) {
+ if (mm_write_lock_killable(current->mm, &mmrange)) {
err = -EINTR;
goto out_fput;
}
@@ -1419,7 +1419,7 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg,
if (IS_ERR_VALUE(addr))
err = (long)addr;
invalid:
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm, &mmrange);
if (populate)
mm_populate(addr, populate);

@@ -1494,7 +1494,7 @@ SYSCALL_DEFINE1(shmdt, char __user *, shmaddr)
if (addr & ~PAGE_MASK)
return retval;

- if (down_write_killable(&mm->mmap_sem))
+ if (mm_write_lock_killable(mm, &mmrange))
return -EINTR;

/*
@@ -1585,7 +1585,7 @@ SYSCALL_DEFINE1(shmdt, char __user *, shmaddr)

#endif

- up_write(&mm->mmap_sem);
+ mm_write_unlock(mm, &mmrange);
return retval;
}

--
2.13.6
\
 
 \ /
  Last update: 2018-02-05 02:29    [W:0.927 / U:0.332 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site