diff options
author | Gary S. Robertson <gary.robertson@linaro.org> | 2014-07-16 17:57:27 -0500 |
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committer | Gary S. Robertson <gary.robertson@linaro.org> | 2014-07-16 17:57:27 -0500 |
commit | 5d8c39dfa92c11553a1091717407aeaddc3de603 (patch) | |
tree | 0df1e82ebdde6b9e3722fd16f9195be36a73c144 /mm/page-writeback.c | |
parent | 0993b170ac452761d5b49bca4f7022f2f14c50bc (diff) | |
parent | c0cbbdebe91a944d653ca75670b77bbf57498150 (diff) |
Merge tag 'v3.14.12' of git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable into linux-lng-v3.14.xlinux-lng-3.14.12-2014.07
This is the 3.14.12 stable release
Conflicts:
arch/arm/mm/proc-v7-3level.S
kernel/hrtimer.c
mm/hugetlb.c
Diffstat (limited to 'mm/page-writeback.c')
-rw-r--r-- | mm/page-writeback.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 7106cb1aca8e..d013dba21429 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -593,14 +593,14 @@ unsigned long bdi_dirty_limit(struct backing_dev_info *bdi, unsigned long dirty) * (5) the closer to setpoint, the smaller |df/dx| (and the reverse) * => fast response on large errors; small oscillation near setpoint */ -static inline long long pos_ratio_polynom(unsigned long setpoint, +static long long pos_ratio_polynom(unsigned long setpoint, unsigned long dirty, unsigned long limit) { long long pos_ratio; long x; - x = div_s64(((s64)setpoint - (s64)dirty) << RATELIMIT_CALC_SHIFT, + x = div64_s64(((s64)setpoint - (s64)dirty) << RATELIMIT_CALC_SHIFT, limit - setpoint + 1); pos_ratio = x; pos_ratio = pos_ratio * x >> RATELIMIT_CALC_SHIFT; @@ -842,7 +842,7 @@ static unsigned long bdi_position_ratio(struct backing_dev_info *bdi, x_intercept = bdi_setpoint + span; if (bdi_dirty < x_intercept - span / 4) { - pos_ratio = div_u64(pos_ratio * (x_intercept - bdi_dirty), + pos_ratio = div64_u64(pos_ratio * (x_intercept - bdi_dirty), x_intercept - bdi_setpoint + 1); } else pos_ratio /= 4; @@ -2398,7 +2398,7 @@ int test_clear_page_writeback(struct page *page) return ret; } -int test_set_page_writeback(struct page *page) +int __test_set_page_writeback(struct page *page, bool keep_write) { struct address_space *mapping = page_mapping(page); int ret; @@ -2423,9 +2423,10 @@ int test_set_page_writeback(struct page *page) radix_tree_tag_clear(&mapping->page_tree, page_index(page), PAGECACHE_TAG_DIRTY); - radix_tree_tag_clear(&mapping->page_tree, - page_index(page), - PAGECACHE_TAG_TOWRITE); + if (!keep_write) + radix_tree_tag_clear(&mapping->page_tree, + page_index(page), + PAGECACHE_TAG_TOWRITE); spin_unlock_irqrestore(&mapping->tree_lock, flags); } else { ret = TestSetPageWriteback(page); @@ -2436,7 +2437,7 @@ int test_set_page_writeback(struct page *page) return ret; } -EXPORT_SYMBOL(test_set_page_writeback); +EXPORT_SYMBOL(__test_set_page_writeback); /* * Return true if any of the pages in the mapping are marked with the |