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| author | Lorenzo Stoakes <lstoakes@gmail.com> | 2016-11-01 19:43:43 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-11-10 15:34:56 +0100 |
| commit | 052662cada1f2104dedfab68866e403a508e045c (patch) | |
| tree | cc59f907754b5513c99d9795c7039ff4a63849e6 | |
| parent | 9d59c6e8ae27638fc733fe759b1a013775e745ee (diff) | |
| download | linux-052662cada1f2104dedfab68866e403a508e045c.tar.bz2 | |
platform: goldfish: pipe: use get_user_pages_unlocked()
Moving from get_user_pages() to get_user_pages_unlocked() simplifies the code
and takes advantage of VM_FAULT_RETRY functionality when faulting in pages.
Signed-off-by: Lorenzo Stoakes <lstoakes@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/platform/goldfish/goldfish_pipe.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/platform/goldfish/goldfish_pipe.c b/drivers/platform/goldfish/goldfish_pipe.c index 1aba2c74160e..2b21033f11f0 100644 --- a/drivers/platform/goldfish/goldfish_pipe.c +++ b/drivers/platform/goldfish/goldfish_pipe.c @@ -308,10 +308,8 @@ static ssize_t goldfish_pipe_read_write(struct file *filp, char __user *buffer, * returns a small amount, then there's no need to pin that * much memory to the process. */ - down_read(¤t->mm->mmap_sem); - ret = get_user_pages(address, 1, is_write ? 0 : FOLL_WRITE, - &page, NULL); - up_read(¤t->mm->mmap_sem); + ret = get_user_pages_unlocked(address, 1, &page, + is_write ? 0 : FOLL_WRITE); if (ret < 0) break; |