Commit 4d3cb611e6df ("swap: add swap_cache_get_folio()") in mm-unstable
tree defines 'swap_cache_get_folio()' for CONFIG_SWAP only, and as a
result build fails on !CONFIG_SWAP as below, after following commits
using the function under !CONFIG_SWAP is applied.
mm/shmem.c: In function ‘shmem_swapin_folio’:
mm/shmem.c:1738:10: error: implicit declaration of function ‘swap_cache_get_folio’; did you mean ‘read_cache_folio’? [-Werror=implicit-function-declaration]
1738 | folio = swap_cache_get_folio(swap, NULL, 0);
| ^~~~~~~~~~~~~~~~~~~~
| read_cache_folio
mm/shmem.c:1738:8: warning: assignment to ‘struct folio *’ from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
1738 | folio = swap_cache_get_folio(swap, NULL, 0);
| ^
cc1: some warnings being treated as errors
This commit fixes the issue by defining the function for !CONFIG_SWAP
case.
Fixes:4d3cb611e6df ("swap: add swap_cache_get_folio()") in mm-unstable (1e6b789996e7)
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
---
Note: This patch does not cleanly applicable on top of the mm-unstable
but the fixing commit.
mm/swap.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/mm/swap.h b/mm/swap.h
index 2d6fe6c44ad9..ccd8d9a9ad36 100644
--- a/mm/swap.h
+++ b/mm/swap.h
@@ -101,6 +101,12 @@ static inline int swap_writepage(struct page *p, struct writeback_control *wbc)
return 0;
}
+static inline struct folio *swap_cache_get_folio(swp_entry_t entry,
+ struct vm_area_struct *vma, unsigned long addr)
+{
+ return NULL;
+}
+
static inline struct page *lookup_swap_cache(swp_entry_t swp,
struct vm_area_struct *vma,
unsigned long addr)
--
2.25.1
