# \[PATCH 04/16\] powerpc/xmon: use new match\_string() helper/macro

- From: Alexandru Ardelean \<hidden\>
- Date: 2019-05-08 11:33:54 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2019/05/5591871
- Thread: https://ratatoskr.run/linuxppc-dev/2019/05/5591850/t.md

```text
The change is purely cosmetic at this point in time, but it does highlight
the change done in lib/string.c for match_string().

Particularly for this change, if a regname is removed (replaced with NULL)
in the list, the match_string() helper will continue until the end of the
array and ignore the NULL.
This would technically allow for "reserved" regs, though here it's not the
case.

Signed-off-by: Alexandru Ardelean <redacted>
---
 arch/powerpc/xmon/xmon.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index efca104ac0cb..b84a7fc1112b 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -3231,7 +3231,7 @@ scanhex(unsigned long *vp)
 			regname[i] = c;
 		}
 		regname[i] = 0;
-		i = __match_string(regnames, N_PTREGS, regname);
+		i = match_string(regnames, regname);
 		if (i < 0) {
 			printf("invalid register name '%%%s'\n", regname);
 			return 0;
-- 
2.17.1
```