linux-kernel - [PATCH 0/3] Cleanup and optimize a few bitmap operations

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <cover.1637789139.git.christophe.jaillet@wanadoo.fr>
Date:   Wed, 24 Nov 2021 22:30:08 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     bharat@...lsio.com, dledford@...hat.com, jgg@...pe.ca
Cc:     linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH 0/3] Cleanup and optimize a few bitmap operations

Patch 1 and 2 are just cleanups that uses 'bitmap_zalloc()' and 'bitmap_set()'
instead of hand-writing these functions.

Patch 3 is more questionable. It replaces calls to '[set|clear]_bit()' by their
non-atomic '__[set|clear]_bit()' alternatives.
It looks safe to do so because accesses to the corresponding bitmaps are
protected by spinlocks.
However, this patch is compile-tested only. It is not sure that it worth
changing the code just for saving a few atomic operations.
So review, test and apply only if it make sense.

Christophe JAILLET (3):
  RDMA/cxgb4: Use bitmap_zalloc() when applicable
  RDMA/cxgb4: Use bitmap_set() when applicable
  RDMA/cxgb4: Use non-atomic bitmap functions when possible

 drivers/infiniband/hw/cxgb4/id_table.c | 17 ++++++-----------
 1 file changed, 6 insertions(+), 11 deletions(-)

-- 
2.30.2