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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2023-03-13 10:14:05 +0100 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2023-03-13 10:14:05 +0100 |
| commit | b3c9a04135bdbd3aabd5e9534bad0fe6df505f8a (patch) | |
| tree | 2372cd098db2a0e45da99125258e454b827cb577 /include/asm-generic/memory_model.h | |
| parent | fbdev: Fix incorrect page mapping clearance at fb_deferred_io_release() (diff) | |
| parent | Linux 6.3-rc2 (diff) | |
| download | linux-b3c9a04135bdbd3aabd5e9534bad0fe6df505f8a.tar.xz linux-b3c9a04135bdbd3aabd5e9534bad0fe6df505f8a.zip | |
Merge drm/drm-fixes into drm-misc-fixes
Backmerging to get latest upstream.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
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. */ |