With the future goal of preventing deadlocks with the shrinker when reclaiming GEM-allocated memory, a variant of shmem_read_mapping_page_gfp() that does not sleep when enough memory isn't available, therefore potentially triggering the shrinker on same driver, is introduced.
Signed-off-by: Adrián Larumbe <[email protected]> --- include/linux/shmem_fs.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/linux/shmem_fs.h b/include/linux/shmem_fs.h index 0b273a7b9f01..5735728aeda2 100644 --- a/include/linux/shmem_fs.h +++ b/include/linux/shmem_fs.h @@ -167,6 +167,13 @@ static inline struct page *shmem_read_mapping_page( mapping_gfp_mask(mapping)); } +static inline struct page *shmem_read_mapping_page_nonblocking( + struct address_space *mapping, pgoff_t index) +{ + return shmem_read_mapping_page_gfp(mapping, index, + mapping_gfp_mask(mapping) | GFP_NOWAIT); +} + static inline bool shmem_file(struct file *file) { if (!IS_ENABLED(CONFIG_SHMEM)) -- 2.47.1
