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mmap.c: deinline a few functions 

__vma_link_file and expand_downwards functions are not small, yeat they
are marked inline.  They probably had one callsite sometime in the past,
but now they have more.  In order to prevent similar thing, I also
deinlined expand_upwards, despite it having only pne callsite.  Nowadays
gcc auto-inlines such static functions anyway.  In find_extend_vma, I
removed one extra level of indirection.

Patch is deliberately generated with -U $BIGNUM to make
it easier to see that functions are big.

Result:

# size */*/mmap.o */vmlinux
   text    data     bss     dec     hex filename
   9514     188      16    9718    25f6 0.org/mm/mmap.o
   9237     188      16    9441    24e1 deinline/mm/mmap.o
6124402  858996  389480 7372878  70804e 0.org/vmlinux
6124113  858996  389480 7372589  707f2d deinline/vmlinux

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Denys Vlasenko 2008-10-18 20:27:01 -07:00 committed by Linus Torvalds
parent 51b07fc3c5
commit cb8f488c33
1 changed files with 4 additions and 4 deletions
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8
mm/mmap.c
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@ -410,7 +410,7 @@ void __vma_link_rb(struct mm_struct *mm, struct vm_area_struct *vma,
rb_insert_color(&vma->vm_rb, &mm->mm_rb);
}
static inline void __vma_link_file(struct vm_area_struct *vma)
static void __vma_link_file(struct vm_area_struct *vma)
{
struct file * file;
@ -1591,7 +1591,7 @@ static int acct_stack_growth(struct vm_area_struct * vma, unsigned long size, un
* vma is the last one with address > vma->vm_end. Have to extend vma.
*/
#ifndef CONFIG_IA64
static inline
static
#endif
int expand_upwards(struct vm_area_struct *vma, unsigned long address)
{
@ -1641,7 +1641,7 @@ int expand_upwards(struct vm_area_struct *vma, unsigned long address)
/*
* vma is the first one with address < vma->vm_start. Have to extend vma.
*/
static inline int expand_downwards(struct vm_area_struct *vma,
static int expand_downwards(struct vm_area_struct *vma,
unsigned long address)
{
int error;
@ -1703,7 +1703,7 @@ find_extend_vma(struct mm_struct *mm, unsigned long addr)
vma = find_vma_prev(mm, addr, &prev);
if (vma && (vma->vm_start <= addr))
return vma;
if (!prev || expand_stack(prev, addr))
if (expand_stack(prev, addr))
return NULL;
if (prev->vm_flags & VM_LOCKED) {
if (mlock_vma_pages_range(prev, addr, prev->vm_end) < 0)