Commit 1aa8aea5 authored by Andrew Morton's avatar Andrew Morton Committed by Linus Torvalds
Browse files

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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 29f9cb53
......@@ -1032,26 +1032,7 @@ static inline pgoff_t page_file_index(struct page *page)
return page->index;
}
/*
* 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;
}
bool page_mapped(struct page *page);
/*
* Return true only if the page has been allocated with
......
......@@ -346,6 +346,29 @@ void *page_rmapping(struct page *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)
{
unsigned long mapping;
......
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