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| author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2008-01-22 15:20:34 +0000 |
|---|---|---|
| committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2008-01-22 15:20:34 +0000 |
| commit | 797c232daded0ae9557d6d9ca1b3f2815345d471 (patch) | |
| tree | c9c89949df6f4a931011c05f1917c8686576cc3c /cpukit | |
| parent | 2008-01-22 Joel Sherrill <joel.sherrill@OARcorp.com> (diff) | |
| download | rtems-797c232daded0ae9557d6d9ca1b3f2815345d471.tar.bz2 | |
2008-01-22 Joel Sherrill <joel.sherrill@OARcorp.com>
* libi2c/README_libi2c: Correct spelling error.
* score/src/threadclearstate.c: Improve comment.
Diffstat (limited to 'cpukit')
| -rw-r--r-- | cpukit/ChangeLog | 5 | ||||
| -rw-r--r-- | cpukit/libi2c/README_libi2c | 32 | ||||
| -rw-r--r-- | cpukit/score/src/threadclearstate.c | 12 |
3 files changed, 30 insertions, 19 deletions
diff --git a/cpukit/ChangeLog b/cpukit/ChangeLog index ab230a264c..754ee6517b 100644 --- a/cpukit/ChangeLog +++ b/cpukit/ChangeLog @@ -1,3 +1,8 @@ +2008-01-22 Joel Sherrill <joel.sherrill@OARcorp.com> + + * libi2c/README_libi2c: Correct spelling error. + * score/src/threadclearstate.c: Improve comment. + 2008-01-18 Jennifer Averett <jennifer.averett@OARcorp.com> * posix/include/rtems/posix/timer.h, posix/src/cleanuppop.c, diff --git a/cpukit/libi2c/README_libi2c b/cpukit/libi2c/README_libi2c index 1dd48faede..f1a8fd017e 100644 --- a/cpukit/libi2c/README_libi2c +++ b/cpukit/libi2c/README_libi2c @@ -40,22 +40,22 @@ Structure This library defines a layered API to i2c and spi devices. The layering is: - +---------------------------------------+ - 6| Application | - +---------------------------------------+ - 5| RTEMS I/O Manager | - +---------------------------------------+ - 4|** libi2c OS adaption layer **| - +---------------------------------------+ - 3| high level i2c device driver | - | (EEPROM, RTC, ...) | - | (e.g. in c/src/libchip/i2c) | - +---------------------------------------+ - 2|** libi2c low level abstration layer **| - +---------------------------------------+ - 1| i2c controller driver | - | (in BSP) | - +---------------------------------------+ + +----------------------------------------+ + 6| Application | + +----------------------------------------+ + 5| RTEMS I/O Manager | + +----------------------------------------+ + 4|** libi2c OS adaption layer **| + +----------------------------------------+ + 3| high level i2c device driver | + | (EEPROM, RTC, ...) | + | (e.g. in c/src/libchip/i2c) | + +----------------------------------------+ + 2|** libi2c low level abstraction layer **| + +----------------------------------------+ + 1| i2c controller driver | + | (in BSP) | + +----------------------------------------+ This document will describe the following interfaces in separate sections: diff --git a/cpukit/score/src/threadclearstate.c b/cpukit/score/src/threadclearstate.c index 8a175fd8cd..f8525b2716 100644 --- a/cpukit/score/src/threadclearstate.c +++ b/cpukit/score/src/threadclearstate.c @@ -75,9 +75,15 @@ void _Thread_Clear_state( /* * If the thread that was unblocked is more important than the heir, - * then we have a new heir. In addition, if the current thread - * is preemptible or we are waking up one of the "pseudo-ISR" system - * threads, then we need to do a context switch. + * then we have a new heir. This may or may not result in a + * context switch. + * + * Normal case: + * If the current thread is preemptible, then we need to do + * a context switch. + * Pseudo-ISR case: + * Even if the thread isn't preemptible, if the new heir is + * a pseudo-ISR system task, we need to do a context switch. */ if ( the_thread->current_priority < _Thread_Heir->current_priority ) { _Thread_Heir = the_thread; |