linux-kernel - [PATCH 0/5] Implement bitlock map allocator

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Message-Id: <1466398515-1005-1-git-send-email-byungchul.park@lge.com>
Date:	Mon, 20 Jun 2016 13:55:10 +0900
From:	Byungchul Park <byungchul.park@....com>
To:	peterz@...radead.org, mingo@...nel.org
Cc:	linux-kernel@...r.kernel.org, npiggin@...e.de,
	sergey.senozhatsky@...il.com, gregkh@...uxfoundation.org,
	minchan@...nel.org
Subject: [PATCH 0/5] Implement bitlock map allocator

Currently, bit-based lock e.g. bit_spin_lock cannot use the lock
correctness validator using lockdep. However, it would be useful if
the validator supports for even bit-based lock as well.

Therefore, this patch provides interface for allocation and freeing
lockdep_map for bit-based lock so that the bit-based lock can also use
the lock correctness validator with the lockdep_map, allocated for each
bit address.

This patch can be applied to any bit_spin_lock user except slab
allocator where I am not sure if using kmalloc is safe. Anyway I chose
two example to apply bitlock map allocator, zram and buffer head.
And applied it and included it in this patch set.

Byungchul Park (5):
  lockdep: Implement bitlock map allocator
  lockdep: Apply bitlock to bit_spin_lock
  lockdep: Apply bit_spin_lock lockdep to zram
  fs/buffer.c: Remove trailing white space
  lockdep: Apply bit_spin_lock lockdep to BH_Uptodate_Lock

 drivers/block/zram/zram_drv.c |  10 +++
 fs/buffer.c                   |  24 +++----
 include/linux/bit_spinlock.h  |  57 ++++++++++++++--
 include/linux/bitlock.h       |  20 ++++++
 kernel/locking/Makefile       |   1 +
 kernel/locking/bitlock_map.c  | 147 ++++++++++++++++++++++++++++++++++++++++++
 lib/Kconfig.debug             |  10 +++
 7 files changed, 252 insertions(+), 17 deletions(-)
 create mode 100644 include/linux/bitlock.h
 create mode 100644 kernel/locking/bitlock_map.c

-- 
1.9.1