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nommu: Provide is_vmalloc_addr() stub.
Introduced in commit-id9e2779fa28
and ifdef'ed out for nommu in8ca3ed87db
, both approaches end up breaking the nommu build in different ways. An impressive feat for a 2-liner. Current is_vmalloc_addr() users fall in to two camps: - Determining whether to use vfree()/kfree() - Whether to do vmlist traversal (only /proc/kcore). Since we don't support /proc/kcore on nommu, that leaves the vfree()/kfree() determination use cases. nommu vfree() happens to be a wrapper to kfree() anyways, so is_vmalloc_addr() can always return 0 and end up with the right behaviour. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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parent
baadac8b10
commit
0738c4bb8f
1 changed files with 10 additions and 3 deletions
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@ -235,15 +235,22 @@ static inline int get_page_unless_zero(struct page *page)
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struct page *vmalloc_to_page(const void *addr);
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unsigned long vmalloc_to_pfn(const void *addr);
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#ifdef CONFIG_MMU
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/* Determine if an address is within the vmalloc range */
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/*
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* Determine if an address is within the vmalloc range
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*
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* On nommu, vmalloc/vfree wrap through kmalloc/kfree directly, so there
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* is no special casing required.
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*/
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static inline int is_vmalloc_addr(const void *x)
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{
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#ifdef CONFIG_MMU
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unsigned long addr = (unsigned long)x;
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return addr >= VMALLOC_START && addr < VMALLOC_END;
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}
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#else
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return 0;
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#endif
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}
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static inline struct page *compound_head(struct page *page)
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{
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