linux-kernel - [PATCH 0/9] Switch to single argument kvfree

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Message-Id: <20211124110308.2053-1-urezki@gmail.com>
Date:   Wed, 24 Nov 2021 12:02:59 +0100
From:   "Uladzislau Rezki (Sony)" <urezki@...il.com>
To:     LKML <linux-kernel@...r.kernel.org>, RCU <rcu@...r.kernel.org>,
        "Paul E . McKenney" <paulmck@...nel.org>
Cc:     Michal Hocko <mhocko@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Daniel Axtens <dja@...ens.net>,
        Frederic Weisbecker <frederic@...nel.org>,
        Neeraj Upadhyay <neeraju@...eaurora.org>,
        Joel Fernandes <joel@...lfernandes.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Theodore Y . Ts'o" <tytso@....edu>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Uladzislau Rezki <urezki@...il.com>,
        Oleksiy Avramchenko <oleksiy.avramchenko@...ymobile.com>
Subject: [PATCH 0/9] Switch to single argument kvfree_rcu() API

Hi!

This is an attempt to replace places in the Linux kernel for using
single argument of kvfree_rcu() API. In short, a single argument
API allows something like below:

<snip>
    void *ptr = kvmalloc(some_bytes, GFP_KERNEL);
        if (ptr)
            kvfree_rcu(ptr);
<snip>

i.e. to free a pointer after a grace period of object that does not
have any rcu_head field inside its structure. Due to lacking of such
mechanism users just do:

<snip>
    synchronize_rcu();
    kfree(p);
<snip>

if they do not want to have an rcu_head element in their data. Thus
this series replaces mentioned places to go with the single argument API.

It is based on the 5.16.0-rc2 also it can be applied on Paul's latest RCU
"dev" branch. 

Thanks!

Uladzislau Rezki (2):
  ext4: Switch to kvfree_rcu() API
  fs: nfs: sysfs: Switch to kvfree_rcu() API

Uladzislau Rezki (Sony) (7):
  ext4: Replace ext4_kvfree_array_rcu() by kvfree_rcu() API
  drivers: Switch to kvfree_rcu() API
  x86/mm: Switch to kvfree_rcu() API
  net/tipc: Switch to kvfree_rcu() API
  net/core: Switch to kvfree_rcu() API
  module: Switch to kvfree_rcu() API
  tracing: Switch to kvfree_rcu() API

 arch/x86/mm/mmio-mod.c                        |  6 ++--
 drivers/block/drbd/drbd_nl.c                  |  9 ++----
 drivers/block/drbd/drbd_receiver.c            |  6 ++--
 drivers/block/drbd/drbd_state.c               |  3 +-
 drivers/block/rnbd/rnbd-srv.c                 |  3 +-
 drivers/crypto/nx/nx-common-pseries.c         |  3 +-
 drivers/infiniband/hw/hfi1/sdma.c             |  3 +-
 drivers/ipack/carriers/tpci200.c              |  3 +-
 drivers/mfd/dln2.c                            |  6 ++--
 drivers/misc/vmw_vmci/vmci_context.c          |  6 ++--
 drivers/misc/vmw_vmci/vmci_event.c            |  3 +-
 .../net/ethernet/chelsio/cxgb4/cxgb4_main.c   |  3 +-
 .../net/ethernet/mellanox/mlx5/core/en/qos.c  |  3 +-
 .../ethernet/mellanox/mlx5/core/fpga/tls.c    |  3 +-
 drivers/net/ethernet/mellanox/mlxsw/core.c    |  3 +-
 drivers/scsi/device_handler/scsi_dh_alua.c    |  3 +-
 drivers/scsi/device_handler/scsi_dh_rdac.c    |  3 +-
 drivers/staging/fwserial/fwserial.c           |  3 +-
 fs/ext4/ext4.h                                |  1 -
 fs/ext4/mballoc.c                             |  2 +-
 fs/ext4/resize.c                              | 31 ++-----------------
 fs/ext4/super.c                               |  5 ++-
 fs/nfs/sysfs.c                                |  7 ++---
 kernel/module.c                               |  3 +-
 kernel/trace/trace_osnoise.c                  |  3 +-
 kernel/trace/trace_probe.c                    |  3 +-
 net/core/sysctl_net_core.c                    |  3 +-
 net/tipc/crypto.c                             |  3 +-
 28 files changed, 37 insertions(+), 96 deletions(-)

-- 
2.30.2