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[PATCH] mm: ptd_alloc inline and out

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It seems odd to me that, whereas pud_alloc and pmd_alloc test inline, only
calling out-of-line __pud_alloc __pmd_alloc if allocation needed,
pte_alloc_map and pte_alloc_kernel are entirely out-of-line.  Though it does
add a little to kernel size, change them to macros testing inline, calling
__pte_alloc or __pte_alloc_kernel to allocate out-of-line.  Mark none of them
as fastcalls, leave that to CONFIG_REGPARM or not.

It also seems more natural for the out-of-line functions to leave the offset
calculation and map to the inline, which has to do it anyway for the common
case.  At least mremap move wants __pte_alloc without _map.

Macros rather than inline functions, certainly to avoid the header file issues
which arise from CONFIG_HIGHPTE needing kmap_types.h, but also in case any
architectures I haven't built would have other such problems.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Hugh Dickins
2005-10-29 18:16:22 -07:00
committed by Linus Torvalds
parent 872fec16d9
commit 1bb3630e89
4 changed files with 61 additions and 88 deletions
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11
include/asm-generic/4level-fixup.h
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@@ -10,14 +10,9 @@
#define pud_t pgd_t
#define pmd_alloc(mm, pud, address) \
({ pmd_t *ret; \
if (pgd_none(*pud)) \
ret = __pmd_alloc(mm, pud, address); \
else \
ret = pmd_offset(pud, address); \
ret; \
})
#define pmd_alloc(mm, pud, address) \
((unlikely(pgd_none(*(pud))) && __pmd_alloc(mm, pud, address))? \
NULL: pmd_offset(pud, address))
#define pud_alloc(mm, pgd, address) (pgd)
#define pud_offset(pgd, start) (pgd)