diff options
| author | Uladzislau Rezki (Sony) <urezki@gmail.com> | 2025-10-07 14:20:32 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-11-16 17:27:54 -0800 |
| commit | b186a94227b753f2fdcab0df29dfc636c63ac329 (patch) | |
| tree | 536cafa9ef5c71c28e872b3915ca48bea3b6d47e /mm/internal.h | |
| parent | ad435e79f8f5d6a5dae8ec122b14802d810defbf (diff) | |
kmsan: remove hard-coded GFP_KERNEL flags
kmsan_vmap_pages_range_noflush() allocates its temp s_pages/o_pages arrays
with GFP_KERNEL, which may sleep. This is inconsistent with vmalloc() as
it will support non-blocking requests later.
Plumb gfp_mask through the kmsan_vmap_pages_range_noflush(), so it can use
it internally for its demand.
Please note, the subsequent __vmap_pages_range_noflush() still uses
GFP_KERNEL and can sleep. If a caller runs under reclaim constraints,
sleeping is forbidden, it must establish the appropriate memalloc scope
API.
Link: https://lkml.kernel.org/r/20251007122035.56347-8-urezki@gmail.com
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/internal.h')
| -rw-r--r-- | mm/internal.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/internal.h b/mm/internal.h index 1561fc2ff5b8..e623c8103358 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -1355,7 +1355,7 @@ size_t splice_folio_into_pipe(struct pipe_inode_info *pipe, #ifdef CONFIG_MMU void __init vmalloc_init(void); int __must_check vmap_pages_range_noflush(unsigned long addr, unsigned long end, - pgprot_t prot, struct page **pages, unsigned int page_shift); + pgprot_t prot, struct page **pages, unsigned int page_shift, gfp_t gfp_mask); unsigned int get_vm_area_page_order(struct vm_struct *vm); #else static inline void vmalloc_init(void) @@ -1364,7 +1364,7 @@ static inline void vmalloc_init(void) static inline int __must_check vmap_pages_range_noflush(unsigned long addr, unsigned long end, - pgprot_t prot, struct page **pages, unsigned int page_shift) + pgprot_t prot, struct page **pages, unsigned int page_shift, gfp_t gfp_mask) { return -EINVAL; } |