diff options
| author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2008-12-18 14:06:51 +0200 |
|---|---|---|
| committer | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2008-12-23 12:23:40 +0200 |
| commit | 4d61db4f87b527734ac0cc830dda8fcc4e2add2f (patch) | |
| tree | 881cb7614a928ba004f588a82c064592f461fee3 /fs/ubifs/super.c | |
| parent | af14a1ad792621942a03e4bd0e5f17b6e177e2e0 (diff) | |
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/super.c')
| -rw-r--r-- | fs/ubifs/super.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index a6a7798d020..c3cefc84137 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -34,6 +34,7 @@ #include <linux/parser.h> #include <linux/seq_file.h> #include <linux/mount.h> +#include <linux/math64.h> #include "ubifs.h" /* @@ -612,7 +613,7 @@ static int bud_wbuf_callback(struct ubifs_info *c, int lnum, int free, int pad) static int init_constants_late(struct ubifs_info *c) { int tmp, err; - uint64_t tmp64; + long long tmp64; c->main_bytes = (long long)c->main_lebs * c->leb_size; c->max_znode_sz = sizeof(struct ubifs_znode) + @@ -639,9 +640,8 @@ static int init_constants_late(struct ubifs_info *c) * Make sure that the log is large enough to fit reference nodes for * all buds plus one reserved LEB. */ - tmp64 = c->max_bud_bytes; - tmp = do_div(tmp64, c->leb_size); - c->max_bud_cnt = tmp64 + !!tmp; + tmp64 = c->max_bud_bytes + c->leb_size - 1; + c->max_bud_cnt = div_u64(tmp64, c->leb_size); tmp = (c->ref_node_alsz * c->max_bud_cnt + c->leb_size - 1); tmp /= c->leb_size; tmp += 1; @@ -677,7 +677,7 @@ static int init_constants_late(struct ubifs_info *c) * Consequently, if the journal is too small, UBIFS will treat it as * always full. */ - tmp64 = (uint64_t)(c->jhead_cnt + 1) * c->leb_size + 1; + tmp64 = (long long)(c->jhead_cnt + 1) * c->leb_size + 1; if (c->bg_bud_bytes < tmp64) c->bg_bud_bytes = tmp64; if (c->max_bud_bytes < tmp64 + c->leb_size) @@ -699,7 +699,7 @@ static int init_constants_late(struct ubifs_info *c) * head is available. */ tmp64 = c->main_lebs - 1 - 1 - MIN_INDEX_LEBS - c->jhead_cnt + 1; - tmp64 *= (uint64_t)c->leb_size - c->leb_overhead; + tmp64 *= (long long)c->leb_size - c->leb_overhead; tmp64 = ubifs_reported_space(c, tmp64); c->block_cnt = tmp64 >> UBIFS_BLOCK_SHIFT; |