[PATCH v2 2/2] powerpc64/bpf: Fix build break for arch_bpf_timed_may_goto

With CONFIG_PPC_KERNEL_PCREL enabled, calling bpf_check_timed_may_goto()
using a bl instruction results in a link-time failure:

arch/powerpc/net/bpf_timed_may_goto.o: in function `arch_bpf_timed_may_goto':
(.text+0x28): call to `bpf_check_timed_may_goto' lacks nop, can't restore toc

Use CFUNC() macro instead of direct 'bl' to properly annotate the call
to bpf_check_timed_may_goto(). On PCREL builds, CFUNC() expands to
'bl name@notoc', informing the linker that TOC restoration is not
needed, avoiding the "lacks nop, can't restore toc" linker error.

Fixes: b55b6b9ad76c ("powerpc64/bpf: Add powerpc64 JIT support for timed may_goto")
Signed-off-by: Saket Kumar Bhaskar <[email protected]>
Reviewed-by: Christophe Leroy (CS GROUP) <[email protected]>
---
 arch/powerpc/net/bpf_timed_may_goto.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/net/bpf_timed_may_goto.S b/arch/powerpc/net/bpf_timed_may_goto.S
index 6fd8b1c9f4ac..84ecf6fa7f5d 100644
--- a/arch/powerpc/net/bpf_timed_may_goto.S
+++ b/arch/powerpc/net/bpf_timed_may_goto.S
@@ -36,7 +36,7 @@ SYM_FUNC_START(arch_bpf_timed_may_goto)
 	 * BPF_REG_FP is r31; BPF_REG_AX is r12 (stack offset in bytes).
 	 */
 	add     r3, r31, r12
-	bl      bpf_check_timed_may_goto
+	bl      CFUNC(bpf_check_timed_may_goto)
 
 	/* Put return value back into AX */
 	mr      r12, r3
-- 
2.54.0