[PATCH v3 03/19] powerpc: Move `path` variable inside DEBUG_PROM

[Mathieu Malaterre]

Add gcc attribute unused for two variables. Fix warnings treated as errors
with W=1:

  arch/powerpc/kernel/prom_init.c:1388:8: error: variable ‘path’ set but not 
used [-Werror=unused-but-set-variable]

Suggested-by: Christophe Leroy <christophe.le...@c-s.fr>
Signed-off-by: Mathieu Malaterre <ma...@debian.org>
---
v3: really move path within ifdef DEBUG_PROM
v2: move path within ifdef DEBUG_PROM

 arch/powerpc/kernel/prom_init.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index acf4b2e0530c..223b35acbbdd 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -603,7 +603,7 @@ static void __init early_cmdline_parse(void)
        const char *opt;
 
        char *p;
-       int l = 0;
+       int l __maybe_unused = 0;
 
        prom_cmd_line[0] = 0;
        p = prom_cmd_line;
@@ -1385,7 +1385,10 @@ static void __init reserve_mem(u64 base, u64 size)
 static void __init prom_init_mem(void)
 {
        phandle node;
-       char *path, type[64];
+#ifdef DEBUG_PROM
+       char *path;
+#endif
+       char type[64];
        unsigned int plen;
        cell_t *p, *endp;
        __be32 val;
@@ -1406,7 +1409,9 @@ static void __init prom_init_mem(void)
        prom_debug("root_size_cells: %x\n", rsc);
 
        prom_debug("scanning memory:\n");
+#ifdef DEBUG_PROM
        path = prom_scratch;
+#endif
 
        for (node = 0; prom_next_node(&node); ) {
                type[0] = 0;
-- 
2.11.0