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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[firefly-linux-kernel-4.4.55.git]
/
mm
/
fadvise.c
diff --git
a/mm/fadvise.c
b/mm/fadvise.c
index e43359214f6ff15020b6f05cc07aa5e6ddcb4162..8d723c9e8b75b316041ea564f5e243b79a94e2b7 100644
(file)
--- a/
mm/fadvise.c
+++ b/
mm/fadvise.c
@@
-77,12
+77,20
@@
SYSCALL_DEFINE(fadvise64_64)(int fd, loff_t offset, loff_t len, int advice)
switch (advice) {
case POSIX_FADV_NORMAL:
file->f_ra.ra_pages = bdi->ra_pages;
switch (advice) {
case POSIX_FADV_NORMAL:
file->f_ra.ra_pages = bdi->ra_pages;
+ spin_lock(&file->f_lock);
+ file->f_mode &= ~FMODE_RANDOM;
+ spin_unlock(&file->f_lock);
break;
case POSIX_FADV_RANDOM:
break;
case POSIX_FADV_RANDOM:
- file->f_ra.ra_pages = 0;
+ spin_lock(&file->f_lock);
+ file->f_mode |= FMODE_RANDOM;
+ spin_unlock(&file->f_lock);
break;
case POSIX_FADV_SEQUENTIAL:
file->f_ra.ra_pages = bdi->ra_pages * 2;
break;
case POSIX_FADV_SEQUENTIAL:
file->f_ra.ra_pages = bdi->ra_pages * 2;
+ spin_lock(&file->f_lock);
+ file->f_mode &= ~FMODE_RANDOM;
+ spin_unlock(&file->f_lock);
break;
case POSIX_FADV_WILLNEED:
if (!mapping->a_ops->readpage) {
break;
case POSIX_FADV_WILLNEED:
if (!mapping->a_ops->readpage) {