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| author | Hugh Dickins <hugh@veritas.com> | 2005-11-23 22:37:37 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-24 01:08:38 +0100 |
| commit | 7b6ac9dffe6f4dd8776908b234ac1410ed15f112 (patch) | |
| tree | 1e30fde299519eb964899be79560599e04a32a66 /fs/binfmt_som.c | |
| parent | [PATCH] revert floppy-fix-read-only-handling (diff) | |
| download | linux-7b6ac9dffe6f4dd8776908b234ac1410ed15f112.tar.xz linux-7b6ac9dffe6f4dd8776908b234ac1410ed15f112.zip | |
[PATCH] mm: update split ptlock Kconfig
Closer attention to the arithmetic shows that neither ppc64 nor sparc really
uses one page for multiple page tables: how on earth could they, while
pte_alloc_one returns just a struct page pointer, with no offset?
Well, arm26 manages it by returning a pte_t pointer cast to a struct page
pointer, harumph, then compensating in its pmd_populate. But arm26 is never
SMP, so it's not a problem for split ptlock either.
And the PA-RISC situation has been recently improved: CONFIG_PA20 works
without the 16-byte alignment which inflated its spinlock_t. But the current
union of spinlock_t with private does make the 7xxx struct page significantly
larger, even without debug, so disable its split ptlock.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/binfmt_som.c')
0 files changed, 0 insertions, 0 deletions