mm: rename __do_fault() -> do_fault()
Current __do_fault() is awful and unmaintainable. These patches try to
sort it out by split __do_fault() into three destinct codepaths:
- to handle read page fault;
- to handle write page fault to private mappings;
- to handle write page fault to shared mappings;
I also found page refcount leak in PageHWPoison() path of __do_fault().
This patch (of 7):
do_fault() is unused: no reason for underscores.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/memory.c b/mm/memory.c
index 57ff351..144e8cd 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2748,7 +2748,7 @@
* bit after it clear all dirty ptes, but before a racing
* do_wp_page installs a dirty pte.
*
- * __do_fault is protected similarly.
+ * do_fault is protected similarly.
*/
if (!page_mkwrite) {
wait_on_page_locked(dirty_page);
@@ -3287,7 +3287,7 @@
}
/*
- * __do_fault() tries to create a new page mapping. It aggressively
+ * do_fault() tries to create a new page mapping. It aggressively
* tries to share with existing pages, but makes a separate copy if
* the FAULT_FLAG_WRITE is set in the flags parameter in order to avoid
* the next page fault.
@@ -3299,7 +3299,7 @@
* but allow concurrent faults), and pte neither mapped nor locked.
* We return with mmap_sem still held, but pte unmapped and unlocked.
*/
-static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma,
+static int do_fault(struct mm_struct *mm, struct vm_area_struct *vma,
unsigned long address, pmd_t *pmd,
pgoff_t pgoff, unsigned int flags, pte_t orig_pte)
{
@@ -3496,7 +3496,7 @@
- vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
pte_unmap(page_table);
- return __do_fault(mm, vma, address, pmd, pgoff, flags, orig_pte);
+ return do_fault(mm, vma, address, pmd, pgoff, flags, orig_pte);
}
/*
@@ -3528,7 +3528,7 @@
}
pgoff = pte_to_pgoff(orig_pte);
- return __do_fault(mm, vma, address, pmd, pgoff, flags, orig_pte);
+ return do_fault(mm, vma, address, pmd, pgoff, flags, orig_pte);
}
static int numa_migrate_prep(struct page *page, struct vm_area_struct *vma,