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author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2008-12-18 14:06:51 +0200 |
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committer | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2008-12-23 12:23:40 +0200 |
commit | 4d61db4f87b527734ac0cc830dda8fcc4e2add2f (patch) | |
tree | 881cb7614a928ba004f588a82c064592f461fee3 /fs/ubifs/budget.c | |
parent | af14a1ad792621942a03e4bd0e5f17b6e177e2e0 (diff) | |
download | linux-stable-4d61db4f87b527734ac0cc830dda8fcc4e2add2f.tar.gz linux-stable-4d61db4f87b527734ac0cc830dda8fcc4e2add2f.tar.bz2 linux-stable-4d61db4f87b527734ac0cc830dda8fcc4e2add2f.zip |
UBIFS: use nicer 64-bit math
Instead of using do_div(), use better primitives from
linux/math64.h.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'fs/ubifs/budget.c')
-rw-r--r-- | fs/ubifs/budget.c | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/fs/ubifs/budget.c b/fs/ubifs/budget.c index e42342547001..0bcb8031ca18 100644 --- a/fs/ubifs/budget.c +++ b/fs/ubifs/budget.c @@ -32,7 +32,7 @@ #include "ubifs.h" #include <linux/writeback.h> -#include <asm/div64.h> +#include <linux/math64.h> /* * When pessimistic budget calculations say that there is no enough space, @@ -258,8 +258,8 @@ static int make_free_space(struct ubifs_info *c, struct retries_info *ri) */ int ubifs_calc_min_idx_lebs(struct ubifs_info *c) { - int ret; - uint64_t idx_size; + int idx_lebs, eff_leb_size = c->leb_size - c->max_idx_node_sz; + long long idx_size; idx_size = c->old_idx_sz + c->budg_idx_growth + c->budg_uncommitted_idx; @@ -271,18 +271,16 @@ int ubifs_calc_min_idx_lebs(struct ubifs_info *c) * pair, nor similarly the two variables for the new index size, so we * have to do this costly 64-bit division on fast-path. */ - if (do_div(idx_size, c->leb_size - c->max_idx_node_sz)) - ret = idx_size + 1; - else - ret = idx_size; + idx_size += eff_leb_size - 1; + idx_lebs = div_u64(idx_size, eff_leb_size); /* * The index head is not available for the in-the-gaps method, so add an * extra LEB to compensate. */ - ret += 1; - if (ret < MIN_INDEX_LEBS) - ret = MIN_INDEX_LEBS; - return ret; + idx_lebs += 1; + if (idx_lebs < MIN_INDEX_LEBS) + idx_lebs = MIN_INDEX_LEBS; + return idx_lebs; } /** @@ -718,7 +716,7 @@ void ubifs_release_dirty_inode_budget(struct ubifs_info *c, * Note, the calculation is pessimistic, which means that most of the time * UBIFS reports less space than it actually has. */ -long long ubifs_reported_space(const struct ubifs_info *c, uint64_t free) +long long ubifs_reported_space(const struct ubifs_info *c, long long free) { int divisor, factor, f; @@ -740,8 +738,7 @@ long long ubifs_reported_space(const struct ubifs_info *c, uint64_t free) divisor = UBIFS_MAX_DATA_NODE_SZ; divisor += (c->max_idx_node_sz * 3) / (f - 1); free *= factor; - do_div(free, divisor); - return free; + return div_u64(free, divisor); } /** |