diff options
| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2023-05-01 15:20:08 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2023-05-01 15:20:08 -0700 |
| commit | 9a87ffc99ec8eb8d35eed7c4f816d75f5cc9662e (patch) | |
| tree | d57f3a63479a07b4e0cece029886e76e04feb984 /include/asm-generic/memory_model.h | |
| parent | 5dc63e56a9cf8df0b59c234a505a1653f1bdf885 (diff) | |
| parent | 53bea86b5712c7491bb3dae12e271666df0a308c (diff) | |
Merge branch 'next' into for-linus
Prepare input updates for 6.4 merge window.
Diffstat (limited to 'include/asm-generic/memory_model.h')
| -rw-r--r-- | include/asm-generic/memory_model.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/asm-generic/memory_model.h b/include/asm-generic/memory_model.h index a2c8ed60233a..6796abe1900e 100644 --- a/include/asm-generic/memory_model.h +++ b/include/asm-generic/memory_model.h @@ -19,6 +19,18 @@ #define __page_to_pfn(page) ((unsigned long)((page) - mem_map) + \ ARCH_PFN_OFFSET) +#ifndef pfn_valid +static inline int pfn_valid(unsigned long pfn) +{ + /* avoid <linux/mm.h> include hell */ + extern unsigned long max_mapnr; + unsigned long pfn_offset = ARCH_PFN_OFFSET; + + return pfn >= pfn_offset && (pfn - pfn_offset) < max_mapnr; +} +#define pfn_valid pfn_valid +#endif + #elif defined(CONFIG_SPARSEMEM_VMEMMAP) /* memmap is virtually contiguous. */ |