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 /arch | |
| parent | [PATCH] x86_64: Remove unused segments (diff) | |
| download | linux-dev-cf0501328674849f8becf6de16620067a0c2f1b5.tar.xz linux-dev-cf0501328674849f8becf6de16620067a0c2f1b5.zip | |
[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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86_64/mm/numa.c | 36 |
1 files changed, 36 insertions, 0 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 |