once upon a time that used to matter; these days we do swap IO for
swap devices at the level that doesn't give a damn about block size,
buffer_head or anything of that sort - just attach the page to
bio, set the location and size (the latter to PAGE_SIZE) and feed
into queue.
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
include/linux/swap.h | 1 -
mm/swapfile.c | 12 +-----------
2 files changed, 1 insertion(+), 12 deletions(-)
diff --git a/include/linux/swap.h b/include/linux/swap.h
index f53d608daa01..a5b640cca459 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -301,7 +301,6 @@ struct swap_info_struct {
struct file *bdev_file; /* open handle of the bdev */
struct block_device *bdev; /* swap device or bdev of swap file */
struct file *swap_file; /* seldom referenced */
- unsigned int old_block_size; /* seldom referenced */
struct completion comp; /* seldom referenced */
spinlock_t lock; /*
* protect map scan related fields like
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 4919423cce76..304f74d039f3 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -2417,7 +2417,6 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
struct inode *inode;
struct filename *pathname;
int err, found = 0;
- unsigned int old_block_size;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
@@ -2529,7 +2528,6 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
}
swap_file = p->swap_file;
- old_block_size = p->old_block_size;
p->swap_file = NULL;
p->max = 0;
swap_map = p->swap_map;
@@ -2553,7 +2551,6 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
inode = mapping->host;
if (p->bdev_file) {
- set_blocksize(p->bdev, old_block_size);
fput(p->bdev_file);
p->bdev_file = NULL;
}
@@ -2782,21 +2779,15 @@ static struct swap_info_struct *alloc_swap_info(void)
static int claim_swapfile(struct swap_info_struct *p, struct inode *inode)
{
- int error;
-
if (S_ISBLK(inode->i_mode)) {
p->bdev_file = bdev_file_open_by_dev(inode->i_rdev,
BLK_OPEN_READ | BLK_OPEN_WRITE, p, NULL);
if (IS_ERR(p->bdev_file)) {
- error = PTR_ERR(p->bdev_file);
+ int error = PTR_ERR(p->bdev_file);
p->bdev_file = NULL;
return error;
}
p->bdev = file_bdev(p->bdev_file);
- p->old_block_size = block_size(p->bdev);
- error = set_blocksize(p->bdev, PAGE_SIZE);
- if (error < 0)
- return error;
/*
* Zoned block devices contain zones that have a sequential
* write only restriction. Hence zoned block devices are not
@@ -3235,7 +3226,6 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
free_percpu(p->cluster_next_cpu);
p->cluster_next_cpu = NULL;
if (p->bdev_file) {
- set_blocksize(p->bdev, p->old_block_size);
fput(p->bdev_file);
p->bdev_file = NULL;
}
--
2.39.2
