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| author |   Mike Snitzer <snitzer@redhat.com> | 2013-08-20 15:05:17 -0400 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2013-08-23 09:02:14 -0400 |
| commit | eb18cba78c2b9250663021e17e1e9cc34630e92a (patch) | |
| tree | e12eaa9ab3e5fddfd27f7697e7f5b0baf00150e5 /drivers/md/dm-table.c | |
| parent | dm space map: optimise sm_ll_dec and sm_ll_inc (diff) | |
| download | linux-dev-eb18cba78c2b9250663021e17e1e9cc34630e92a.tar.xz linux-dev-eb18cba78c2b9250663021e17e1e9cc34630e92a.zip | |
math64: New separate div64_u64_rem helper
Commit f792685006274a850e6cc0ea9ade275ccdfc90bc ("math64: New
div64_u64_rem helper") implemented div64_u64 in terms of div64_u64_rem.
But div64_u64_rem was removed because it slowed down div64_u64 (and
there were no other users of div64_u64_rem).
Device Mapper's I/O statistics support has a need for div64_u64_rem;
reintroduce this helper as a separate method that doesn't slow down
div64_u64, especially on 32-bit systems.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-table.c')
0 files changed, 0 insertions, 0 deletions