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| author | David Brownell | 2007-05-17 07:11:13 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2007-05-17 14:23:05 +0200 |
| commit | 83c6590cb83d3106df12fee36ac2a261951b8c88 (patch) | |
| tree | 8906e0f3366959e2595d26d263ab32922958743b /Documentation/vm/locking | |
| parent | docbook: make kernel-locking table readable (diff) | |
| download | kernel-qcow2-linux-83c6590cb83d3106df12fee36ac2a261951b8c88.tar.gz kernel-qcow2-linux-83c6590cb83d3106df12fee36ac2a261951b8c88.tar.xz kernel-qcow2-linux-83c6590cb83d3106df12fee36ac2a261951b8c88.zip | |
gpio interface loosens call restrictions
Loosen gpio_{request,free}() and gpio_direction_{in,out}put() call context
restrictions slightly, so a common idiom is no longer an error: board init
code setting up spinlock-safe GPIOs before tasking is enabled.
The issue was caught by some paranoid code with might_sleep() checks. The
legacy platform-specific GPIO interfaces stick to spinlock-safe GPIOs, so this
change reflects current implementations and won't break anything.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/vm/locking')
0 files changed, 0 insertions, 0 deletions