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thp: compound_trans_order

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Read compound_trans_order safe. Noop for CONFIG_TRANSPARENT_HUGEPAGE=n.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrea Arcangeli
2011-01-13 15:47:16 -08:00
committed by Linus Torvalds
parent 91600e9e59
commit 37c2ac7872
3 changed files with 26 additions and 12 deletions
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12
mm/memory-failure.c
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@@ -203,7 +203,7 @@ static int kill_proc_ao(struct task_struct *t, unsigned long addr, int trapno,
#ifdef __ARCH_SI_TRAPNO
si.si_trapno = trapno;
#endif
si.si_addr_lsb = compound_order(compound_head(page)) + PAGE_SHIFT;
si.si_addr_lsb = compound_trans_order(compound_head(page)) + PAGE_SHIFT;
/*
* Don't use force here, it's convenient if the signal
* can be temporarily blocked.
@@ -930,7 +930,7 @@ static int hwpoison_user_mappings(struct page *p, unsigned long pfn,
static void set_page_hwpoison_huge_page(struct page *hpage)
{
int i;
int nr_pages = 1 << compound_order(hpage);
int nr_pages = 1 << compound_trans_order(hpage);
for (i = 0; i < nr_pages; i++)
SetPageHWPoison(hpage + i);
}
@@ -938,7 +938,7 @@ static void set_page_hwpoison_huge_page(struct page *hpage)
static void clear_page_hwpoison_huge_page(struct page *hpage)
{
int i;
int nr_pages = 1 << compound_order(hpage);
int nr_pages = 1 << compound_trans_order(hpage);
for (i = 0; i < nr_pages; i++)
ClearPageHWPoison(hpage + i);
}
@@ -968,7 +968,7 @@ int __memory_failure(unsigned long pfn, int trapno, int flags)
return 0;
}
nr_pages = 1 << compound_order(hpage);
nr_pages = 1 << compound_trans_order(hpage);
atomic_long_add(nr_pages, &mce_bad_pages);
/*
@@ -1166,7 +1166,7 @@ int unpoison_memory(unsigned long pfn)
return 0;
}
nr_pages = 1 << compound_order(page);
nr_pages = 1 << compound_trans_order(page);
if (!get_page_unless_zero(page)) {
/*
@@ -1304,7 +1304,7 @@ static int soft_offline_huge_page(struct page *page, int flags)
}
done:
if (!PageHWPoison(hpage))
atomic_long_add(1 << compound_order(hpage), &mce_bad_pages);
atomic_long_add(1 << compound_trans_order(hpage), &mce_bad_pages);
set_page_hwpoison_huge_page(hpage);
dequeue_hwpoisoned_huge_page(hpage);
/* keep elevated page count for bad page */