[PATCH v3 00/11] bitmap: prereqs for ip_tunnel flags conversion

[Alexander Lobakin]

Based on top of "lib/bitmap: add bitmap_{read,write}()"[0] from Alexander
Potapenko as it uses those new bitmap_{read,write}() functions to not
introduce another pair of similar ones.

Derived from the PFCP support series[1] as this grew bigger (2 -> 13
commits in v2) and involved more core bitmap changes, finally transforming
into a pure bitmap series. The actual mentioned ip_tunnel flags conversion
from `__be16` to bitmaps will be submitted bundled with the PFCP set after
this one lands.

Little breakdown:
 * #1, #8, #10: misc cleanups;
 * #2, #5, #6, #7: symbol scope, name collisions;
 * #3, #4, #9, #11: compile-time optimizations.

[0] https://lore.kernel.org/lkml/20231109151106.2385155-1-glider@xxxxxxxxxx
[1] https://lore.kernel.org/netdev/20230721071532.613888-1-marcin.szycik@xxxxxxxxxxxxxxx

Alexander Lobakin (11):
  bitops: add missing prototype check
  bitops: make BYTES_TO_BITS() treewide-available
  bitops: let the compiler optimize {__,}assign_bit()
  linkmode: convert linkmode_{test,set,clear,mod}_bit() to macros
  s390/cio: rename bitmap_size() -> idset_bitmap_size()
  fs/ntfs3: add prefix to bitmap_size() and use BITS_TO_U64()
  btrfs: rename bitmap_set_bits() -> btrfs_bitmap_set_bits()
  tools: move alignment-related macros to new <linux/align.h>
  bitmap: introduce generic optimized bitmap_size()
  bitmap: make bitmap_{get,set}_value8() use bitmap_{read,write}()
  lib/bitmap: add compile-time test for __assign_bit() optimization

 drivers/md/dm-clone-metadata.c |  5 ----
 drivers/s390/cio/idset.c       | 12 +++++----
 fs/btrfs/free-space-cache.c    |  8 +++---
 fs/ntfs3/bitmap.c              |  4 +--
 fs/ntfs3/fsntfs.c              |  2 +-
 fs/ntfs3/index.c               | 11 ++++----
 fs/ntfs3/ntfs_fs.h             |  4 +--
 fs/ntfs3/super.c               |  2 +-
 include/linux/bitmap.h         | 46 ++++++++--------------------------
 include/linux/bitops.h         | 23 ++++++-----------
 include/linux/cpumask.h        |  2 +-
 include/linux/linkmode.h       | 27 +++-----------------
 kernel/trace/trace_probe.c     |  2 --
 lib/math/prime_numbers.c       |  2 --
 lib/test_bitmap.c              | 18 +++++++------
 tools/include/linux/align.h    | 11 ++++++++
 tools/include/linux/bitmap.h   |  9 ++++---
 tools/include/linux/bitops.h   |  2 ++
 tools/include/linux/mm.h       |  5 +---
 tools/perf/util/probe-finder.c |  4 +--
 20 files changed, 75 insertions(+), 124 deletions(-)
 create mode 100644 tools/include/linux/align.h

---
>From v2[2]:
 * 00: drop ip_tunnel part: will be sent together with the PFCP part once
   this gets accepted (Jakub, Yury);
 * 02: fix format string literal build warning due to the new generic
   macro having different implicit type (Stephen);
 * 04: pick Acked-by (Jakub);
 * 08: new;
 * 09: pick Acked-by (Yury), fix including the header not existing under
   the tools/ tree (via #8) (Stephen);.

>From v1[3]:
 * 03: convert assign_bit() to a macro as well, saves some bytes and
   looks more consistent (Yury);
 * 03: enclose each argument into own pair of braces (Yury);
 * 06: use generic BITS_TO_U64() while at it (Yury);
 * 07: pick Acked-by (David);
 * 08: Acked-by, use bitmap_size() in the code from 05 as well (Yury);
 * 09: instead of introducing a new pair of functions, use generic
   bitmap_{read,write}() from [0]. bloat-o-meter shows no regressions
   from the switch (Yury, also Andy).

Old pfcp -> bitmap changelog:

As for former commits (now 10 and 11), almost all of the changes were
suggested by Andy, notably: stop violating bitmap API, use
__assign_bit() where appropriate, and add more tests to make sure
everything works as expected. Apart from that, add simple wrappers for
bitmap_*() used in the IP tunnel code to avoid manually specifying
``__IP_TUNNEL_FLAG_NUM`` each time.

[2] https://lore.kernel.org/lkml/20231016165247.14212-1-aleksander.lobakin@xxxxxxxxx
[3] https://lore.kernel.org/lkml/20231009151026.66145-1-aleksander.lobakin@xxxxxxxxx
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2.41.0