linux-kernel - [RESEND PATCH v5 3.17-rc1 4/8] kdb: Use KDB_REPEAT

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Message-Id: <1408456922-12221-5-git-send-email-daniel.thompson@linaro.org>
Date:	Tue, 19 Aug 2014 15:01:58 +0100
From:	Daniel Thompson <daniel.thompson@...aro.org>
To:	Jason Wessel <jason.wessel@...driver.com>
Cc:	Anton Vorontsov <anton.vorontsov@...aro.org>, patches@...aro.org,
	linaro-kernel@...ts.linaro.org, linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.cz>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	John Stultz <john.stultz@...aro.org>,
	Colin Cross <ccross@...roid.com>, kernel-team@...roid.com,
	kgdb-bugreport@...ts.sourceforge.net,
	Daniel Thompson <daniel.thompson@...aro.org>,
	Mike Travis <travis@....com>
Subject: [RESEND PATCH v5 3.17-rc1 4/8] kdb: Use KDB_REPEAT_* values as flags

From: Anton Vorontsov <anton.vorontsov@...aro.org>

The actual values of KDB_REPEAT_* enum values and overall logic stayed
the same, but we now treat the values as flags.

This makes it possible to add other flags and combine them, plus makes
the code a lot simpler and shorter. But functionality-wise, there should
be no changes.

Signed-off-by: Anton Vorontsov <anton.vorontsov@...aro.org>
Signed-off-by: John Stultz <john.stultz@...aro.org>
Signed-off-by: Daniel Thompson <daniel.thompson@...aro.org>
Cc: Jason Wessel <jason.wessel@...driver.com>
Cc: Mike Travis <travis@....com>
Cc: kgdb-bugreport@...ts.sourceforge.net
---
 include/linux/kdb.h         |  4 ++--
 kernel/debug/kdb/kdb_main.c | 21 +++++++--------------
 2 files changed, 9 insertions(+), 16 deletions(-)

diff --git a/include/linux/kdb.h b/include/linux/kdb.h
index 32d2f40..90aed7c 100644
--- a/include/linux/kdb.h
+++ b/include/linux/kdb.h
@@ -15,8 +15,8 @@
 
 typedef enum {
 	KDB_REPEAT_NONE = 0,	/* Do not repeat this command */
-	KDB_REPEAT_NO_ARGS,	/* Repeat the command without arguments */
-	KDB_REPEAT_WITH_ARGS,	/* Repeat the command including its arguments */
+	KDB_REPEAT_NO_ARGS	= 0x1, /* Repeat the command w/o arguments */
+	KDB_REPEAT_WITH_ARGS	= 0x2, /* Repeat the command w/ its arguments */
 } kdb_cmdflags_t;
 
 typedef int (*kdb_func_t)(int, const char **);
diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
index 070f1ff..cbacae2 100644
--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -1008,20 +1008,13 @@ int kdb_parse(const char *cmdstr)
 		if (result && ignore_errors && result > KDB_CMD_GO)
 			result = 0;
 		KDB_STATE_CLEAR(CMD);
-		switch (tp->cmd_flags) {
-		case KDB_REPEAT_NONE:
-			argc = 0;
-			if (argv[0])
-				*(argv[0]) = '\0';
-			break;
-		case KDB_REPEAT_NO_ARGS:
-			argc = 1;
-			if (argv[1])
-				*(argv[1]) = '\0';
-			break;
-		case KDB_REPEAT_WITH_ARGS:
-			break;
-		}
+
+		if (tp->cmd_flags & KDB_REPEAT_WITH_ARGS)
+			return result;
+
+		argc = tp->cmd_flags & KDB_REPEAT_NO_ARGS ? 1 : 0;
+		if (argv[argc])
+			*(argv[argc]) = '\0';
 		return result;
 	}
 
-- 
1.9.3

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