summaryrefslogtreecommitdiff
path: root/mm/swapfile.c
diff options
context:
space:
mode:
Diffstat (limited to 'mm/swapfile.c')
-rw-r--r--mm/swapfile.c25
1 files changed, 7 insertions, 18 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 41e4581af7c5..aebc2dd6e649 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -2143,11 +2143,10 @@ static int claim_swapfile(struct swap_info_struct *p, struct inode *inode)
if (S_ISBLK(inode->i_mode)) {
p->bdev = bdgrab(I_BDEV(inode));
error = blkdev_get(p->bdev,
- FMODE_READ | FMODE_WRITE | FMODE_EXCL,
- sys_swapon);
+ FMODE_READ | FMODE_WRITE | FMODE_EXCL, p);
if (error < 0) {
p->bdev = NULL;
- return -EINVAL;
+ return error;
}
p->old_block_size = block_size(p->bdev);
error = set_blocksize(p->bdev, PAGE_SIZE);
@@ -2348,7 +2347,6 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
struct filename *name;
struct file *swap_file = NULL;
struct address_space *mapping;
- int i;
int prio;
int error;
union swap_header *swap_header;
@@ -2388,19 +2386,8 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
p->swap_file = swap_file;
mapping = swap_file->f_mapping;
-
- for (i = 0; i < nr_swapfiles; i++) {
- struct swap_info_struct *q = swap_info[i];
-
- if (q == p || !q->swap_file)
- continue;
- if (mapping == q->swap_file->f_mapping) {
- error = -EBUSY;
- goto bad_swap;
- }
- }
-
inode = mapping->host;
+
/* If S_ISREG(inode->i_mode) will do mutex_lock(&inode->i_mutex); */
error = claim_swapfile(p, inode);
if (unlikely(error))
@@ -2433,6 +2420,8 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
goto bad_swap;
}
if (p->bdev && blk_queue_nonrot(bdev_get_queue(p->bdev))) {
+ int cpu;
+
p->flags |= SWP_SOLIDSTATE;
/*
* select a random position to start with to help wear leveling
@@ -2451,9 +2440,9 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
error = -ENOMEM;
goto bad_swap;
}
- for_each_possible_cpu(i) {
+ for_each_possible_cpu(cpu) {
struct percpu_cluster *cluster;
- cluster = per_cpu_ptr(p->percpu_cluster, i);
+ cluster = per_cpu_ptr(p->percpu_cluster, cpu);
cluster_set_null(&cluster->index);
}
}