diff options
| author | Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> | 2017-07-10 15:47:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-10 16:32:30 -0700 |
| commit | 0348d2ebec9b00ea87b42dffdb3f393007303b82 (patch) | |
| tree | 85991ae5964e329086728d25185bbdc853e00ce7 /mm/memory-failure.c | |
| parent | ddd40d8a2c4ef8f2152ea6d227e11475cf7e5bfa (diff) | |
| download | linux-rt-0348d2ebec9b00ea87b42dffdb3f393007303b82.tar.gz | |
mm: hwpoison: introduce idenfity_page_state
Factoring duplicate code into a function.
Link: http://lkml.kernel.org/r/1496305019-5493-10-git-send-email-n-horiguchi@ah.jp.nec.com
Signed-off-by: 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>
Diffstat (limited to 'mm/memory-failure.c')
| -rw-r--r-- | mm/memory-failure.c | 57 |
1 files changed, 25 insertions, 32 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 2aec57c07652..e2e0cb0e1d0f 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1022,9 +1022,31 @@ static bool hwpoison_user_mappings(struct page *p, unsigned long pfn, return unmap_success; } -static int memory_failure_hugetlb(unsigned long pfn, int trapno, int flags) +static int identify_page_state(unsigned long pfn, struct page *p, + unsigned long page_flags) { struct page_state *ps; + + /* + * The first check uses the current page flags which may not have any + * relevant information. The second check with the saved page flags is + * carried out only if the first check can't determine the page status. + */ + for (ps = error_states;; ps++) + if ((p->flags & ps->mask) == ps->res) + break; + + page_flags |= (p->flags & (1UL << PG_dirty)); + + if (!ps->mask) + for (ps = error_states;; ps++) + if ((page_flags & ps->mask) == ps->res) + break; + return page_action(ps, p, pfn); +} + +static int memory_failure_hugetlb(unsigned long pfn, int trapno, int flags) +{ struct page *p = pfn_to_page(pfn); struct page *head = compound_head(p); int res; @@ -1074,19 +1096,7 @@ static int memory_failure_hugetlb(unsigned long pfn, int trapno, int flags) goto out; } - res = -EBUSY; - - for (ps = error_states;; ps++) - if ((p->flags & ps->mask) == ps->res) - break; - - page_flags |= (p->flags & (1UL << PG_dirty)); - - if (!ps->mask) - for (ps = error_states;; ps++) - if ((page_flags & ps->mask) == ps->res) - break; - res = page_action(ps, p, pfn); + res = identify_page_state(pfn, p, page_flags); out: unlock_page(head); return res; @@ -1112,7 +1122,6 @@ out: */ int memory_failure(unsigned long pfn, int trapno, int flags) { - struct page_state *ps; struct page *p; struct page *hpage; struct page *orig_head; @@ -1273,23 +1282,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags) } identify_page_state: - res = -EBUSY; - /* - * The first check uses the current page flags which may not have any - * relevant information. The second check with the saved page flagss is - * carried out only if the first check can't determine the page status. - */ - for (ps = error_states;; ps++) - if ((p->flags & ps->mask) == ps->res) - break; - - page_flags |= (p->flags & (1UL << PG_dirty)); - - if (!ps->mask) - for (ps = error_states;; ps++) - if ((page_flags & ps->mask) == ps->res) - break; - res = page_action(ps, p, pfn); + res = identify_page_state(pfn, p, page_flags); out: unlock_page(p); return res; |