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f2fs: Mark some functions as taking a const page pointer

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The compiler can make some optimisations if we tell it that a function
call doesn't change this memory.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2025-02-18 05:51:49 +00:00 committed by Jaegeuk Kim
parent fb9660481e
commit 521a468486
2 changed files with 4 additions and 4 deletions

2
fs/f2fs/f2fs.h

@ -2026,7 +2026,7 @@ static inline struct f2fs_checkpoint *F2FS_CKPT(struct f2fs_sb_info *sbi)
return (struct f2fs_checkpoint *)(sbi->ckpt);
}
static inline struct f2fs_node *F2FS_NODE(struct page *page)
static inline struct f2fs_node *F2FS_NODE(const struct page *page)
{
return (struct f2fs_node *)page_address(page);
}

6
fs/f2fs/node.h

@ -248,7 +248,7 @@ static inline nid_t nid_of_node(struct page *node_page)
return le32_to_cpu(rn->footer.nid);
}
static inline unsigned int ofs_of_node(struct page *node_page)
static inline unsigned int ofs_of_node(const struct page *node_page)
{
struct f2fs_node *rn = F2FS_NODE(node_page);
unsigned flag = le32_to_cpu(rn->footer.flag);
@ -342,7 +342,7 @@ static inline bool is_recoverable_dnode(struct page *page)
* `- indirect node ((6 + 2N) + (N - 1)(N + 1))
* `- direct node
*/
static inline bool IS_DNODE(struct page *node_page)
static inline bool IS_DNODE(const struct page *node_page)
{
unsigned int ofs = ofs_of_node(node_page);
@ -389,7 +389,7 @@ static inline nid_t get_nid(struct page *p, int off, bool i)
* - Mark cold data pages in page cache
*/
static inline int is_node(struct page *page, int type)
static inline int is_node(const struct page *page, int type)
{
struct f2fs_node *rn = F2FS_NODE(page);
return le32_to_cpu(rn->footer.flag) & BIT(type);