From: Johannes Thumshirn <jthumshirn@suse.de>
Date: Wed, 5 Dec 2018 14:23:04 +0000 (+0100)
Subject: btrfs: use PAGE_ALIGNED instead of open-coding it
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=fdb1e121803433775d1e6f79b21a13add8b22f57;p=openwrt%2Fstaging%2Fblogic.git

btrfs: use PAGE_ALIGNED instead of open-coding it

When using a 'var & (PAGE_SIZE - 1)' construct one is checking for a page
alignment and thus should use the PAGE_ALIGNED() macro instead of
open-coding it.

Convert all open-coded occurrences of PAGE_ALIGNED().

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c
index d319c3020c09..84e9729badaa 100644
--- a/fs/btrfs/check-integrity.c
+++ b/fs/btrfs/check-integrity.c
@@ -1601,7 +1601,7 @@ static int btrfsic_read_block(struct btrfsic_state *state,
 	BUG_ON(block_ctx->datav);
 	BUG_ON(block_ctx->pagev);
 	BUG_ON(block_ctx->mem_to_free);
-	if (block_ctx->dev_bytenr & ((u64)PAGE_SIZE - 1)) {
+	if (!PAGE_ALIGNED(block_ctx->dev_bytenr)) {
 		pr_info("btrfsic: read_block() with unaligned bytenr %llu\n",
 		       block_ctx->dev_bytenr);
 		return -1;
@@ -1778,7 +1778,7 @@ again:
 				return;
 			}
 			is_metadata = 1;
-			BUG_ON(BTRFS_SUPER_INFO_SIZE & (PAGE_SIZE - 1));
+			BUG_ON(!PAGE_ALIGNED(BTRFS_SUPER_INFO_SIZE));
 			processed_len = BTRFS_SUPER_INFO_SIZE;
 			if (state->print_mask &
 			    BTRFSIC_PRINT_MASK_TREE_BEFORE_SB_WRITE) {
@@ -2892,12 +2892,12 @@ int btrfsic_mount(struct btrfs_fs_info *fs_info,
 	struct list_head *dev_head = &fs_devices->devices;
 	struct btrfs_device *device;
 
-	if (fs_info->nodesize & ((u64)PAGE_SIZE - 1)) {
+	if (!PAGE_ALIGNED(fs_info->nodesize)) {
 		pr_info("btrfsic: cannot handle nodesize %d not being a multiple of PAGE_SIZE %ld!\n",
 		       fs_info->nodesize, PAGE_SIZE);
 		return -1;
 	}
-	if (fs_info->sectorsize & ((u64)PAGE_SIZE - 1)) {
+	if (!PAGE_ALIGNED(fs_info->sectorsize)) {
 		pr_info("btrfsic: cannot handle sectorsize %d not being a multiple of PAGE_SIZE %ld!\n",
 		       fs_info->sectorsize, PAGE_SIZE);
 		return -1;
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 2ab5591449f2..d5381f39a9e8 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -301,7 +301,7 @@ blk_status_t btrfs_submit_compressed_write(struct inode *inode, u64 start,
 	blk_status_t ret;
 	int skip_sum = BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM;
 
-	WARN_ON(start & ((u64)PAGE_SIZE - 1));
+	WARN_ON(!PAGE_ALIGNED(start));
 	cb = kmalloc(compressed_bio_size(fs_info, compressed_len), GFP_NOFS);
 	if (!cb)
 		return BLK_STS_RESOURCE;
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 2d8aacf072c0..3c71fcd402d0 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2039,7 +2039,7 @@ int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
 			      unsigned int extra_bits,
 			      struct extent_state **cached_state, int dedupe)
 {
-	WARN_ON((end & (PAGE_SIZE - 1)) == 0);
+	WARN_ON(PAGE_ALIGNED(end));
 	return set_extent_delalloc(&BTRFS_I(inode)->io_tree, start, end,
 				   extra_bits, cached_state);
 }