diff options
| author | Andi Kleen <ak@suse.de> | 2006-01-11 22:46:27 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-11 19:05:01 -0800 |
| commit | cf0501328674849f8becf6de16620067a0c2f1b5 (patch) | |
| tree | 6f449d3b82bc178573d8a991e29c1eff8e6b94a5 | |
| parent | cdc4b9c01909d606afbc1e4a4b6c21fa1687a016 (diff) | |
| download | linux-cf0501328674849f8becf6de16620067a0c2f1b5.tar.gz | |
[PATCH] x86_64: Move NUMA page_to_pfn/pfn_to_page functions out of line
Saves about ~18K .text in defconfig There would be more optimization potential, but that's for later. Suggestion originally from Bill Irwin. Fix from Andy Whitcroft. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | arch/x86_64/mm/numa.c | 36 | ||||
| -rw-r--r-- | include/asm-x86_64/mmzone.h | 16 |
2 files changed, 39 insertions, 13 deletions
diff --git a/arch/x86_64/mm/numa.c b/arch/x86_64/mm/numa.c index 994dbaeb33f0..6ef9f9a76235 100644 --- a/arch/x86_64/mm/numa.c +++ b/arch/x86_64/mm/numa.c @@ -360,3 +360,39 @@ EXPORT_SYMBOL(node_to_cpumask); EXPORT_SYMBOL(memnode_shift); EXPORT_SYMBOL(memnodemap); EXPORT_SYMBOL(node_data); + +#ifdef CONFIG_DISCONTIGMEM +/* + * Functions to convert PFNs from/to per node page addresses. + * These are out of line because they are quite big. + * They could be all tuned by pre caching more state. + * Should do that. + */ + +/* Requires pfn_valid(pfn) to be true */ +struct page *pfn_to_page(unsigned long pfn) +{ + int nid = phys_to_nid(((unsigned long)(pfn)) << PAGE_SHIFT); + return (pfn - node_start_pfn(nid)) + NODE_DATA(nid)->node_mem_map; +} +EXPORT_SYMBOL(pfn_to_page); + +unsigned long page_to_pfn(struct page *page) +{ + return (long)(((page) - page_zone(page)->zone_mem_map) + + page_zone(page)->zone_start_pfn); +} +EXPORT_SYMBOL(page_to_pfn); + +int pfn_valid(unsigned long pfn) +{ + unsigned nid; + if (pfn >= num_physpages) + return 0; + nid = pfn_to_nid(pfn); + if (nid == 0xff) + return 0; + return pfn >= node_start_pfn(nid) && (pfn) < node_end_pfn(nid); +} +EXPORT_SYMBOL(pfn_valid); +#endif diff --git a/include/asm-x86_64/mmzone.h b/include/asm-x86_64/mmzone.h index 69baaa8a3ce0..972c9359f7d7 100644 --- a/include/asm-x86_64/mmzone.h +++ b/include/asm-x86_64/mmzone.h @@ -36,22 +36,12 @@ static inline __attribute__((pure)) int phys_to_nid(unsigned long addr) NODE_DATA(nid)->node_spanned_pages) #ifdef CONFIG_DISCONTIGMEM - #define pfn_to_nid(pfn) phys_to_nid((unsigned long)(pfn) << PAGE_SHIFT) #define kvaddr_to_nid(kaddr) phys_to_nid(__pa(kaddr)) -/* Requires pfn_valid(pfn) to be true */ -#define pfn_to_page(pfn) ({ \ - int nid = phys_to_nid(((unsigned long)(pfn)) << PAGE_SHIFT); \ - ((pfn) - node_start_pfn(nid)) + NODE_DATA(nid)->node_mem_map; \ -}) - -#define page_to_pfn(page) \ - (long)(((page) - page_zone(page)->zone_mem_map) + page_zone(page)->zone_start_pfn) - -#define pfn_valid(pfn) ((pfn) >= num_physpages ? 0 : \ - ({ u8 nid__ = pfn_to_nid(pfn); \ - nid__ != 0xff && (pfn) >= node_start_pfn(nid__) && (pfn) < node_end_pfn(nid__); })) +extern struct page *pfn_to_page(unsigned long pfn); +extern unsigned long page_to_pfn(struct page *page); +extern int pfn_valid(unsigned long pfn); #endif #define local_mapnr(kvaddr) \ |