mbox series

[v4,0/7] kernel.h further split

Message ID 20211007154407.29746-1-andriy.shevchenko@linux.intel.com (mailing list archive)
Headers show
Series kernel.h further split | expand

Message

Andy Shevchenko Oct. 7, 2021, 3:44 p.m. UTC 
v3: https://lore.kernel.org/linux-media/20211007150339.28910-1-andriy.shevchenko@linux.intel.com/T/#u
v2: https://lore.kernel.org/linux-media/20211007095129.22037-1-andriy.shevchenko@linux.intel.com/T/#u

The kernel.h is a set of something which is not related to each other
and often used in non-crossed compilation units, especially when drivers
need only one or two macro definitions from it.

Here is the split of container_of(). The goals are the following:
- untwist the dependency hell a bit
- drop kernel.h inclusion where it's only used for container_of()
- speed up C preprocessing.

The build speedup is
	1.83% (ccache approach, see v2 cover letter for the details)
	0.5%  (kcbench approach, see v3 cover letter for the details)

In v4:
- dropped kobject.h change (Greg)
- Cc'ed more people (as per v1)

In v3:
- split patch 2 to more patches (Greg)
- excluded C changes (Herbert, Greg)
- measured with kcbench, see below (Greg)

Andy Shevchenko (7):
  kernel.h: Drop unneeded <linux/kernel.h> inclusion from other headers
  kernel.h: Split out container_of() and typeof_member() macros
  kunit: Replace kernel.h with the necessary inclusions
  list.h: Replace kernel.h with the necessary inclusions
  llist: Replace kernel.h with the necessary inclusions
  plist: Replace kernel.h with the necessary inclusions
  media: entity: Replace kernel.h with the necessary inclusions

 include/kunit/test.h         | 14 ++++++++++++--
 include/linux/container_of.h | 37 ++++++++++++++++++++++++++++++++++++
 include/linux/kernel.h       | 31 +-----------------------------
 include/linux/list.h         |  6 ++++--
 include/linux/llist.h        |  4 +++-
 include/linux/plist.h        |  5 ++++-
 include/linux/rwsem.h        |  1 -
 include/linux/spinlock.h     |  1 -
 include/media/media-entity.h |  3 ++-
 9 files changed, 63 insertions(+), 39 deletions(-)
 create mode 100644 include/linux/container_of.h