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authorJason Wessel <jason.wessel@windriver.com>2010-05-20 22:04:22 -0400
committerJason Wessel <jason.wessel@windriver.com>2010-05-20 22:04:22 -0400
commitf5316b4aea024da9266d740322a5481657f6ce59 (patch)
tree5888fd0afa54fc3bab2711e583147c4b563836bc /include/linux/kdb.h
parentdcc7871128e99458ca86186b7bc8bf27ff0c47b5 (diff)
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.h1
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 @@
19#include <asm/atomic.h> 19#include <asm/atomic.h>
20 20
21#define KDB_POLL_FUNC_MAX 5 21#define KDB_POLL_FUNC_MAX 5
22extern int kdb_poll_idx;
22 23
23/* 24/*
24 * kdb_initial_cpu is initialized to -1, and is set to the cpu 25 * kdb_initial_cpu is initialized to -1, and is set to the cpu