[PATCH 1/2] powerpc64/bpf: Fix build break in bpf_jit_emit_func_call_rel()

[Saket Kumar Bhaskar <skb99@linux.ibm.com>]

From: Madhavan Srinivasan <maddy@linux.ibm.com>

With CONFIG_PPC_KERNEL_PCREL enabled, build breaks with below error:

  CC      mm/dmapool.o
  CC      fs/readdir.o
arch/powerpc/net/bpf_jit_comp64.c: In function 'bpf_jit_emit_func_call_rel':
arch/powerpc/net/bpf_jit_comp64.c:475:13: error: unused variable 'ret' [-Werror=unused-variable]
  475 |         int ret;
      |             ^~~

commit b55b6b9ad76c ("powerpc64/bpf: Add powerpc64 JIT support for timed may_goto")
introduced "ret" variable to bpf_jit_emit_func_call_rel() and it is used only in
else block of CONFIG_PPC_KERNEL_PCREL, fix by adding a "__maybe_unused"

Fixes: b55b6b9ad76c ("powerpc64/bpf: Add powerpc64 JIT support for timed may_goto")
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Signed-off-by: Saket Kumar Bhaskar <skb99@linux.ibm.com>
---
 arch/powerpc/net/bpf_jit_comp64.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/net/bpf_jit_comp64.c b/arch/powerpc/net/bpf_jit_comp64.c
index dab106cae22b..63952ef19256 100644
--- a/arch/powerpc/net/bpf_jit_comp64.c
+++ b/arch/powerpc/net/bpf_jit_comp64.c
@@ -472,7 +472,7 @@ int bpf_jit_emit_func_call_rel(u32 *image, u32 *fimage, struct codegen_context *
 {
 	unsigned long func_addr = func ? ppc_function_entry((void *)func) : 0;
 	long __maybe_unused reladdr;
-	int ret;
+	int __maybe_unused ret;
 
 	/* bpf to bpf call, func is not known in the initial pass. Emit 5 nops as a placeholder */
 	if (!func) {
-- 
2.54.0