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[3/7] btrfs: prepare btrfs_page_mkwrite() for larger data folios

Message ID 8d975a6a45c3abac0a1eca861a9d0f4d5795ffe1.1741839616.git.wqu@suse.com (mailing list archive)
State New
Headers show
Series btrfs: remove ASSERT()s for folio_order() and folio_test_large() | expand

Commit Message

Qu Wenruo March 13, 2025, 4:20 a.m. UTC 
The function btrfs_page_mkwrite() has an explicit ASSERT() checking the
folio order.

To make it support larger data folios, we need to:

- Remove the ASSERT(folio_order(folio) == 0)

- Use folio_contains() to check if the folio covers the last page

Otherwise the code is already supporting larger folios well.

Signed-off-by: Qu Wenruo <wqu@suse.com>
---
 fs/btrfs/file.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 262a707d8990..4213807982d6 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1791,8 +1791,6 @@  static vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf)
 	u64 page_end;
 	u64 end;
 
-	ASSERT(folio_order(folio) == 0);
-
 	reserved_space = fsize;
 
 	sb_start_pagefault(inode->i_sb);
@@ -1857,7 +1855,7 @@  static vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf)
 		goto again;
 	}
 
-	if (folio->index == ((size - 1) >> PAGE_SHIFT)) {
+	if (folio_contains(folio, (size - 1) >> PAGE_SHIFT)) {
 		reserved_space = round_up(size - page_start, fs_info->sectorsize);
 		if (reserved_space < fsize) {
 			end = page_start + reserved_space - 1;