The patch titled
mm: mlock_vma_pages_range() only return success or failure
has been added to the -mm tree. Its filename is
mlock_vma_pages_range-only-return-success-or-failure.patch
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Subject: mm: mlock_vma_pages_range() only return success or failure
From: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Currently, mlock_vma_pages_range() only return len or 0. then current
error handling of mmap_region() is meaningless complex.
This patch makes simplify and makes consist with brk() code.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Nick Piggin <npiggin@xxxxxxx>
Cc: Lee Schermerhorn <lee.schermerhorn@xxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamewzawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Hugh Dickins <hugh.dickins@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mmap.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN mm/mmap.c~mlock_vma_pages_range-only-return-success-or-failure mm/mmap.c
--- a/mm/mmap.c~mlock_vma_pages_range-only-return-success-or-failure
+++ a/mm/mmap.c
@@ -1265,8 +1265,8 @@ out:
mm->total_vm += len >> PAGE_SHIFT;
vm_stat_account(mm, vm_flags, file, len >> PAGE_SHIFT);
if (vm_flags & VM_LOCKED) {
- long nr_pages = mlock_vma_pages_range(vma, addr, addr + len);
- mm->locked_vm += (len >> PAGE_SHIFT) - nr_pages;
+ if (!mlock_vma_pages_range(vma, addr, addr + len))
+ mm->locked_vm += (len >> PAGE_SHIFT);
} else if ((flags & MAP_POPULATE) && !(flags & MAP_NONBLOCK))
make_pages_present(addr, addr + len);
return addr;
_
Patches currently in -mm which might be from kosaki.motohiro@xxxxxxxxxxxxxx are
linux-next.patch
mm-introduce-dump_page-and-print-symbolic-flag-names.patch
mlock_vma_pages_range-never-return-negative-value.patch
mlock_vma_pages_range-only-return-success-or-failure.patch
prctl-add-pr_set_proctitle_area-option-for-prctl.patch
mm-pass-mm-flags-as-a-coredump-parameter-for-consistency.patch
fs-symlink-write_begin-allocation-context-fix-reiser4-fix.patch
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