linux-kernel - [PATCH 0/3] binder: Use kmap_local_page() in binder

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Message-Id: <20220423102421.16869-1-fmdefrancesco@gmail.com>
Date:   Sat, 23 Apr 2022 12:24:18 +0200
From:   "Fabio M. De Francesco" <fmdefrancesco@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arve Hjønnevåg <arve@...roid.com>,
        Todd Kjos <tkjos@...roid.com>,
        Martijn Coenen <maco@...roid.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Christian Brauner <brauner@...nel.org>,
        Hridya Valsaraju <hridya@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Ira Weiny <ira.weiny@...el.com>, linux-kernel@...r.kernel.org
Cc:     "Fabio M. De Francesco" <fmdefrancesco@...il.com>
Subject: [PATCH 0/3] binder: Use kmap_local_page() in binder_alloc.c

Use kmap_local_page() in binder_alloc.c because kmap() and kmap_atomic()
are being deprecated and kmap_local_page is preferred where it is feasible.

With kmap_local_page(), the mapping is per thread, CPU local and not
globally visible. Furthermore, the mapping can be acquired from any
context, including interrupts.

Fabio M. De Francesco (3):
  binder: Use memset_page() in binder_alloc_clear_buf()
  binder: Use kmap_local_page() in binder_alloc_copy_user_to_buffer()
  binder: Use kmap_local_page() in binder_alloc_get_page()

 drivers/android/binder_alloc.c | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

-- 
2.34.1