The patch titled
mm-more-rmap-checking tidy
has been added to the -mm tree. Its filename is
mm-more-rmap-checking-tidy.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: mm-more-rmap-checking tidy
From: Nick Piggin <npiggin@xxxxxxx>
I've moved the bugchecks under CONFIG_DEBUG_VM.
Cc: Hugh Dickins <hugh@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/rmap.h | 10 +++++++++-
mm/rmap.c | 8 ++++++--
2 files changed, 15 insertions(+), 3 deletions(-)
diff -puN include/linux/rmap.h~mm-more-rmap-checking-tidy include/linux/rmap.h
--- a/include/linux/rmap.h~mm-more-rmap-checking-tidy
+++ a/include/linux/rmap.h
@@ -72,9 +72,17 @@ void __anon_vma_link(struct vm_area_stru
void page_add_anon_rmap(struct page *, struct vm_area_struct *, unsigned long);
void page_add_new_anon_rmap(struct page *, struct vm_area_struct *, unsigned long);
void page_add_file_rmap(struct page *);
-void page_dup_rmap(struct page *page, struct vm_area_struct *vma, unsigned long address);
void page_remove_rmap(struct page *, struct vm_area_struct *);
+#ifdef CONFIG_DEBUG_VM
+void page_dup_rmap(struct page *page, struct vm_area_struct *vma, unsigned long address);
+#else
+static inline void page_dup_rmap(struct page *page, struct vm_area_struct *vma, unsigned long address)
+{
+ atomic_inc(&page->_mapcount);
+}
+#endif
+
/*
* Called from mm/vmscan.c to handle paging out
*/
diff -puN mm/rmap.c~mm-more-rmap-checking-tidy mm/rmap.c
--- a/mm/rmap.c~mm-more-rmap-checking-tidy
+++ a/mm/rmap.c
@@ -538,6 +538,7 @@ static void __page_set_anon_rmap(struct
static void __page_check_anon_rmap(struct page *page,
struct vm_area_struct *vma, unsigned long address)
{
+#ifdef CONFIG_DEBUG_VM
/*
* The page's anon-rmap details (mapping and index) are guaranteed to
* be set up correctly at this point.
@@ -554,6 +555,7 @@ static void __page_check_anon_rmap(struc
anon_vma = (void *) anon_vma + PAGE_MAPPING_ANON;
BUG_ON(page->mapping != (struct address_space *)anon_vma);
BUG_ON(page->index != linear_page_index(vma, address));
+#endif
}
/**
@@ -567,8 +569,8 @@ static void __page_check_anon_rmap(struc
void page_add_anon_rmap(struct page *page,
struct vm_area_struct *vma, unsigned long address)
{
- BUG_ON(!PageLocked(page));
- BUG_ON(address < vma->vm_start || address >= vma->vm_end);
+ VM_BUG_ON(!PageLocked(page));
+ VM_BUG_ON(address < vma->vm_start || address >= vma->vm_end);
if (atomic_inc_and_test(&page->_mapcount))
__page_set_anon_rmap(page, vma, address);
else
@@ -605,6 +607,7 @@ void page_add_file_rmap(struct page *pag
__inc_zone_page_state(page, NR_FILE_MAPPED);
}
+#ifdef CONFIG_DEBUG_VM
/**
* page_dup_rmap - duplicate pte mapping to a page
* @page: the page to add the mapping to
@@ -622,6 +625,7 @@ void page_dup_rmap(struct page *page, st
__page_check_anon_rmap(page, vma, address);
atomic_inc(&page->_mapcount);
}
+#endif
/**
* page_remove_rmap - take down pte mapping from a page
_
Patches currently in -mm which might be from npiggin@xxxxxxx are
slob-implement-rcu-freeing.patch
mm-more-rmap-checking.patch
mm-more-rmap-checking-tidy.patch
mm-fix-fault-vs-invalidate-race-for-linear-mappings.patch
mm-merge-populate-and-nopage-into-fault-fixes-nonlinear.patch
mm-merge-populate-and-nopage-into-fault-fixes-nonlinear-fix.patch
mm-merge-nopfn-into-fault.patch
mm-remove-legacy-cruft.patch
mm-debug-check-for-the-fault-vs-invalidate-race.patch
mm-fix-clear_page_dirty_for_io-vs-fault-race.patch
mm-document-fault_data-and-flags.patch
-
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