linux-kernel - [PATCH v1 1/1] powerpc/prom_init: Move custom isspace() to its own namespace

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Date:   Mon, 10 May 2021 17:49:25 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Michael Ellerman <mpe@...erman.id.au>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        kernel test robot <lkp@...el.com>
Subject: [PATCH v1 1/1] powerpc/prom_init: Move custom isspace() to its own namespace

If by some reason any of the headers will include ctype.h
we will have a name collision. Avoid this by moving isspace()
to the dedicate namespace.

First appearance of the code is in the commit cf68787b68a2
("powerpc/prom_init: Evaluate mem kernel parameter for early allocation").

Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 arch/powerpc/kernel/prom_init.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 41ed7e33d897..6845cbbc0cd4 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -701,13 +701,13 @@ static int __init prom_setprop(phandle node, const char *nodename,
 }
 
 /* We can't use the standard versions because of relocation headaches. */
-#define isxdigit(c)	(('0' <= (c) && (c) <= '9') \
-			 || ('a' <= (c) && (c) <= 'f') \
-			 || ('A' <= (c) && (c) <= 'F'))
+#define prom_isxdigit(c)	(('0' <= (c) && (c) <= '9') \
+				 || ('a' <= (c) && (c) <= 'f') \
+				 || ('A' <= (c) && (c) <= 'F'))
 
-#define isdigit(c)	('0' <= (c) && (c) <= '9')
-#define islower(c)	('a' <= (c) && (c) <= 'z')
-#define toupper(c)	(islower(c) ? ((c) - 'a' + 'A') : (c))
+#define prom_isdigit(c)		('0' <= (c) && (c) <= '9')
+#define prom_islower(c)		('a' <= (c) && (c) <= 'z')
+#define prom_toupper(c)		(prom_islower(c) ? ((c) - 'a' + 'A') : (c))
 
 static unsigned long prom_strtoul(const char *cp, const char **endp)
 {
@@ -716,14 +716,14 @@ static unsigned long prom_strtoul(const char *cp, const char **endp)
 	if (*cp == '0') {
 		base = 8;
 		cp++;
-		if (toupper(*cp) == 'X') {
+		if (prom_toupper(*cp) == 'X') {
 			cp++;
 			base = 16;
 		}
 	}
 
-	while (isxdigit(*cp) &&
-	       (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) {
+	while (prom_isxdigit(*cp) &&
+	       (value = prom_isdigit(*cp) ? *cp - '0' : prom_toupper(*cp) - 'A' + 10) < base) {
 		result = result * base + value;
 		cp++;
 	}
-- 
2.30.2