[RESEND PATCH v5 3.19-rc2 4/8] kdb: Use KDB_REPEAT_* values as flags

[Daniel Thompson]

From: Anton Vorontsov <anton.vorontsov@xxxxxxxxxx>

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@xxxxxxxxxx>
Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
Signed-off-by: Daniel Thompson <daniel.thompson@xxxxxxxxxx>
Cc: Jason Wessel <jason.wessel@xxxxxxxxxxxxx>
---
 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 32d2f407981d..90aed7c31f0d 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 070f1ff358d2..cbacae24a55a 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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