linux-hardening - [PATCH 0/5] pstore: Use zstd directly by default for compression

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Date:   Mon, 17 Oct 2022 19:08:08 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Ard Biesheuvel <ardb@...nel.org>
Cc:     Kees Cook <keescook@...omium.org>, Tony Luck <tony.luck@...el.com>,
        "Guilherme G. Piccoli" <gpiccoli@...lia.com>,
        Nick Terrell <terrelln@...com>, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org
Subject: [PATCH 0/5] pstore: Use zstd directly by default for compression

Hi,

Okay, here is a very lightly tested version of using zstd directly, which
should save 128KB per CPU compare to using crypto API. This leaves the
crypto API available, though, if someone wants to use it instead. Even
supporting both, this is a net reduction in code, due to dropping all
the zbufsize logic.

How does this look?

-Kees

Kees Cook (5):
  pstore: Remove worse-case compression size logic
  pstore: Allow for arbitrary compression algorithm
  pstore: Use size_t for compress/decompression type widths
  pstore: Refactor compression initialization
  pstore: Use zstd directly by default for compression

 fs/pstore/Kconfig    | 131 +++++-----------
 fs/pstore/platform.c | 358 ++++++++++++++++++++-----------------------
 2 files changed, 209 insertions(+), 280 deletions(-)

-- 
2.34.1