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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2006-03-27 04:15:25 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-27 11:44:44 -0500
commita117e66ed45ac0569c039ea60bd7a9a61e031858 (patch)
tree292367ab930f83c418c34d4c46f95717e5e6394e /include/linux/mmzone.h
parentb06be912a3ad68c69dba0ed6e92723140020e392 (diff)
[PATCH] unify pfn_to_page: generic functions
There are 3 memory models, FLATMEM, DISCONTIGMEM, SPARSEMEM. Each arch has its own page_to_pfn(), pfn_to_page() for each models. But most of them can use the same arithmetic. This patch adds asm-generic/memory_model.h, which includes generic page_to_pfn(), pfn_to_page() definitions for each memory model. When CONFIG_OUT_OF_LINE_PFN_TO_PAGE=y, out-of-line functions are used instead of macro. This is enabled by some archs and reduces text size. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Hugh Dickins <hugh@veritas.com> Cc: Andi Kleen <ak@muc.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ian Molton <spyro@f2s.com> Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Hirokazu Takata <takata.hirokazu@renesas.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp> Cc: Richard Curnow <rc@rc0.org.uk> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp> Cc: Chris Zankel <chris@zankel.net> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/mmzone.h')
-rw-r--r--include/linux/mmzone.h11
1 files changed, 0 insertions, 11 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index ebfc238cc243..0c1c0c0cce65 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -602,17 +602,6 @@ static inline struct mem_section *__pfn_to_section(unsigned long pfn)
602 return __nr_to_section(pfn_to_section_nr(pfn)); 602 return __nr_to_section(pfn_to_section_nr(pfn));
603} 603}
604 604
605#define pfn_to_page(pfn) \
606({ \
607 unsigned long __pfn = (pfn); \
608 __section_mem_map_addr(__pfn_to_section(__pfn)) + __pfn; \
609})
610#define page_to_pfn(page) \
611({ \
612 page - __section_mem_map_addr(__nr_to_section( \
613 page_to_section(page))); \
614})
615
616static inline int pfn_valid(unsigned long pfn) 605static inline int pfn_valid(unsigned long pfn)
617{ 606{
618 if (pfn_to_section_nr(pfn) >= NR_MEM_SECTIONS) 607 if (pfn_to_section_nr(pfn) >= NR_MEM_SECTIONS)