OpenSDV
/
original_kernel
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

mm: uninline page_mapped() 

It's huge.  Uninlining it saves 206 bytes per callsite.  Shaves 4924
bytes from the x86_64 allmodconfig vmlinux.

[akpm@linux-foundation.org: coding-style fixes]
Cc: Steve Capper <steve.capper@arm.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrew Morton 2016-05-19 17:12:00 -07:00 committed by Linus Torvalds
parent 29f9cb53d2
commit 1aa8aea535
2 changed files with 24 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
include/linux/mm.h
View File

@ -1032,26 +1032,7 @@ static inline pgoff_t page_file_index(struct page *page)
return page->index; return page->index;
} }
/* bool page_mapped(struct page *page);
* Return true if this page is mapped into pagetables.
* For compound page it returns true if any subpage of compound page is mapped.
*/
static inline bool page_mapped(struct page *page)
{
int i;
if (likely(!PageCompound(page)))
return atomic_read(&page->_mapcount) >= 0;
page = compound_head(page);
if (atomic_read(compound_mapcount_ptr(page)) >= 0)
return true;
if (PageHuge(page))
return false;
for (i = 0; i < hpage_nr_pages(page); i++) {
if (atomic_read(&page[i]._mapcount) >= 0)
return true;
}
return false;
}
/* /*
* Return true only if the page has been allocated with * Return true only if the page has been allocated with

23
mm/util.c
View File

@ -346,6 +346,29 @@ void *page_rmapping(struct page *page)
return __page_rmapping(page); return __page_rmapping(page);
} }
/*
* Return true if this page is mapped into pagetables.
* For compound page it returns true if any subpage of compound page is mapped.
*/
bool page_mapped(struct page *page)
{
int i;
if (likely(!PageCompound(page)))
return atomic_read(&page->_mapcount) >= 0;
page = compound_head(page);
if (atomic_read(compound_mapcount_ptr(page)) >= 0)
return true;
if (PageHuge(page))
return false;
for (i = 0; i < hpage_nr_pages(page); i++) {
if (atomic_read(&page[i]._mapcount) >= 0)
return true;
}
return false;
}
EXPORT_SYMBOL(page_mapped);
struct anon_vma *page_anon_vma(struct page *page) struct anon_vma *page_anon_vma(struct page *page)
{ {
unsigned long mapping; unsigned long mapping;