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Subject[PATCH v4 03/19] powerpc: Mark variable `l` as unused, remove `path`
Date
Add gcc attribute unused for `l` variable, replace `path` variable directly
with prom_scratch. Fix warnings treated as errors with W=1:

arch/powerpc/kernel/prom_init.c:607:6: error: variable ‘l’ set but not used [-Werror=unused-but-set-variable]
arch/powerpc/kernel/prom_init.c:1388:8: error: variable ‘path’ set but not used [-Werror=unused-but-set-variable]

Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Mathieu Malaterre <malat@debian.org>
---
v4: redo v3 since path variable can be avoided
v3: really move path within ifdef DEBUG_PROM
v2: move path within ifdef DEBUG_PROM

arch/powerpc/kernel/prom_init.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index f8a9a50ff9b5..4b223a9470be 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -604,7 +604,7 @@ 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;
@@ -1386,7 +1386,7 @@ static void __init reserve_mem(u64 base, u64 size)
static void __init prom_init_mem(void)
{
phandle node;
- char *path, type[64];
+ char type[64];
unsigned int plen;
cell_t *p, *endp;
__be32 val;
@@ -1407,7 +1407,6 @@ static void __init prom_init_mem(void)
prom_debug("root_size_cells: %x\n", rsc);

prom_debug("scanning memory:\n");
- path = prom_scratch;

for (node = 0; prom_next_node(&node); ) {
type[0] = 0;
@@ -1432,9 +1431,9 @@ static void __init prom_init_mem(void)
endp = p + (plen / sizeof(cell_t));

#ifdef DEBUG_PROM
- memset(path, 0, PROM_SCRATCH_SIZE);
- call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
- prom_debug(" node %s :\n", path);
+ memset(prom_scratch, 0, PROM_SCRATCH_SIZE);
+ call_prom("package-to-path", 3, 1, node, prom_scratch, PROM_SCRATCH_SIZE - 1);
+ prom_debug(" node %s :\n", prom_scratch);
#endif /* DEBUG_PROM */

while ((endp - p) >= (rac + rsc)) {
--
2.11.0
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