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| author | akpm@osdl.org <akpm@osdl.org> | 2005-04-17 00:23:57 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:23:57 +0200 |
| commit | d42ce812b8a32adddeee3a692005f82f95ff15a3 (patch) | |
| tree | 41cd169ef17e4388189a0f1c46abe88375a7ddd5 /arch/arm/mm | |
| parent | [PATCH] arm: add comment about dma_supported() (diff) | |
| download | linux-d42ce812b8a32adddeee3a692005f82f95ff15a3.tar.xz linux-d42ce812b8a32adddeee3a692005f82f95ff15a3.zip | |
[PATCH] arm: add comment about max_low_pfn/max_pfn
)
From: Russell King <rmk+lkml@arm.linux.org.uk>
Oddly, max_low_pfn/max_pfn end up being the number of pages in the system,
rather than the maximum PFN on ARM. This doesn't seem to cause any problems,
so just add a note about it.
Signed-off-by: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/arm/mm')
| -rw-r--r-- | arch/arm/mm/init.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index 41156c5370f7..72a2b8cee319 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -223,6 +223,9 @@ find_memend_and_nodes(struct meminfo *mi, struct node_info *np) * This doesn't seem to be used by the Linux memory * manager any more. If we can get rid of it, we * also get rid of some of the stuff above as well. + * + * Note: max_low_pfn and max_pfn reflect the number + * of _pages_ in the system, not the maximum PFN. */ max_low_pfn = memend_pfn - O_PFN_DOWN(PHYS_OFFSET); max_pfn = memend_pfn - O_PFN_DOWN(PHYS_OFFSET); |