jump_label: Fix sparc64 warning

The kbuild test robot reported the following warning on sparc64:

kernel/jump_label.c: In function '__jump_label_update':
kernel/jump_label.c:376:51: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
WARN_ONCE(1, "can't patch jump_label at %pS", (void *)entry->code);

On sparc64, the jump_label entry->code field is of type u32, but
pointers are 64-bit. Silence the warning by casting entry->code to an
unsigned long before casting it to a pointer. This is also what the
sparc jump label code does.

Fixes: dc1dd184c2f0 ("jump_label: Warn on failed jump_label patching attempt")
Reported-by: kbuild test robot <[e-mail]>
Signed-off-by: Josh Poimboeuf <[e-mail]>
Signed-off-by: Thomas Gleixner <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Jason Baron <[e-mail]>
Cc: Borislav Petkov <[e-mail]>
Cc: "David S . Miller" <[e-mail]>
Link: https://lkml.kernel.org/r/[e-mail]

kernel/jump_label.c

···
 			if (kernel_text_address(entry->code))
 				arch_jump_label_transform(entry, jump_label_type(entry));
 			else
-				WARN_ONCE(1, "can't patch jump_label at %pS", (void *)entry->code);
+				WARN_ONCE(1, "can't patch jump_label at %pS",
+					  (void *)(unsigned long)entry->code);
 		}
 	}
 }