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Diffstat (limited to 'Documentation/DocBook/kernel-locking.tmpl')
| -rw-r--r-- | Documentation/DocBook/kernel-locking.tmpl | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/Documentation/DocBook/kernel-locking.tmpl b/Documentation/DocBook/kernel-locking.tmpl index 084f6ad7b7a0..0b1a3f97f285 100644 --- a/Documentation/DocBook/kernel-locking.tmpl +++ b/Documentation/DocBook/kernel-locking.tmpl @@ -1922,9 +1922,12 @@ machines due to caching. <function>mutex_lock()</function> </para> <para> - There is a <function>mutex_trylock()</function> which can be - used inside interrupt context, as it will not sleep. + There is a <function>mutex_trylock()</function> which does not + sleep. Still, it must not be used inside interrupt context since + its implementation is not safe for that. <function>mutex_unlock()</function> will also never sleep. + It cannot be used in interrupt context either since a mutex + must be released by the same task that acquired it. </para> </listitem> </itemizedlist> |