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| author | Jason Wessel <jason.wessel@windriver.com> | 2010-05-20 21:04:22 -0500 |
|---|---|---|
| committer | Jason Wessel <jason.wessel@windriver.com> | 2010-05-20 21:04:22 -0500 |
| commit | f5316b4aea024da9266d740322a5481657f6ce59 (patch) | |
| tree | 5888fd0afa54fc3bab2711e583147c4b563836bc /include/linux/kdb.h | |
| parent | dcc7871128e99458ca86186b7bc8bf27ff0c47b5 (diff) | |
| download | lwn-f5316b4aea024da9266d740322a5481657f6ce59.tar.gz lwn-f5316b4aea024da9266d740322a5481657f6ce59.zip | |
kgdb,8250,pl011: Return immediately from console poll
The design of the kdb shell requires that every device that can
provide input to kdb have a polling routine that exits immediately if
there is no character available. This is required in order to get the
page scrolling mechanism working.
Changing the kernel debugger I/O API to require all polling character
routines to exit immediately if there is no data allows the kernel
debugger to process multiple input channels.
NO_POLL_CHAR will be the return code to the polling routine when ever
there is no character available.
CC: linux-serial@vger.kernel.org
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Diffstat (limited to 'include/linux/kdb.h')
| -rw-r--r-- | include/linux/kdb.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/kdb.h b/include/linux/kdb.h index 4d93790faec3..d72fa3908128 100644 --- a/include/linux/kdb.h +++ b/include/linux/kdb.h @@ -19,6 +19,7 @@ #include <asm/atomic.h> #define KDB_POLL_FUNC_MAX 5 +extern int kdb_poll_idx; /* * kdb_initial_cpu is initialized to -1, and is set to the cpu |