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BKL: introduce CONFIG_BKL.

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With all the patches we have queued in the BKL removal tree, only a
few dozen modules are left that actually rely on the BKL, and even
there are lots of low-hanging fruit. We need to decide what to do
about them, this patch illustrates one of the options:

Every user of the BKL is marked as 'depends on BKL' in Kconfig,
and the CONFIG_BKL becomes a user-visible option. If it gets
disabled, no BKL using module can be built any more and the BKL
code itself is compiled out.

The one exception is file locking, which is practically always
enabled and does a 'select BKL' instead. This effectively forces
CONFIG_BKL to be enabled until we have solved the fs/lockd
mess and can apply the patch that removes the BKL from fs/locks.c.

Signed-off-by: Arnd Bergmann <[email protected]>
This commit is contained in:
Arnd Bergmann 2010-09-11 18:00:57 +02:00
commit 6de5bd128d
21 changed files with 36 additions and 5 deletions
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1
drivers/media/Kconfig
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@ -19,6 +19,7 @@ comment "Multimedia core support"
config VIDEO_DEV
tristate "Video For Linux"
depends on BKL # used in many drivers for ioctl handling, need to kill
---help---
V4L core support for video capture and overlay devices, webcams and
AM/FM radio cards.