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mm: remove gcc workaround 

Minimum gcc version is 3.2 now.  However, with likely profiling, even
modern gcc versions cannot always eliminate the call.

Replace the placeholder functions with the more conventional empty static
inlines, which should be optimal for everyone.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Nick Piggin 2007-05-06 14:49:02 -07:00 committed by Linus Torvalds
parent d2ba27e800
commit 5f22df00a0
2 changed files with 18 additions and 12 deletions
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18
include/linux/mm.h
View File

@ -850,8 +850,26 @@ static inline int vma_wants_writenotify(struct vm_area_struct *vma)
extern pte_t *FASTCALL(get_locked_pte(struct mm_struct *mm, unsigned long addr, spinlock_t **ptl)); extern pte_t *FASTCALL(get_locked_pte(struct mm_struct *mm, unsigned long addr, spinlock_t **ptl));
#ifdef __PAGETABLE_PUD_FOLDED
static inline int __pud_alloc(struct mm_struct *mm, pgd_t *pgd,
unsigned long address)
{
return 0;
}
#else
int __pud_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long address); int __pud_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long address);
#endif
#ifdef __PAGETABLE_PMD_FOLDED
static inline int __pmd_alloc(struct mm_struct *mm, pud_t *pud,
unsigned long address)
{
return 0;
}
#else
int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address); int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address);
#endif
int __pte_alloc(struct mm_struct *mm, pmd_t *pmd, unsigned long address); int __pte_alloc(struct mm_struct *mm, pmd_t *pmd, unsigned long address);
int __pte_alloc_kernel(pmd_t *pmd, unsigned long address); int __pte_alloc_kernel(pmd_t *pmd, unsigned long address);

12
mm/memory.c
View File

@ -2633,12 +2633,6 @@ int __pud_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long address)
spin_unlock(&mm->page_table_lock); spin_unlock(&mm->page_table_lock);
return 0; return 0;
} }
#else
/* Workaround for gcc 2.96 */
int __pud_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long address)
{
return 0;
}
#endif /* __PAGETABLE_PUD_FOLDED */ #endif /* __PAGETABLE_PUD_FOLDED */
#ifndef __PAGETABLE_PMD_FOLDED #ifndef __PAGETABLE_PMD_FOLDED
@ -2667,12 +2661,6 @@ int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address)
spin_unlock(&mm->page_table_lock); spin_unlock(&mm->page_table_lock);
return 0; return 0;
} }
#else
/* Workaround for gcc 2.96 */
int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address)
{
return 0;
}
#endif /* __PAGETABLE_PMD_FOLDED */ #endif /* __PAGETABLE_PMD_FOLDED */
int make_pages_present(unsigned long addr, unsigned long end) int make_pages_present(unsigned long addr, unsigned long end)