[PATCH -next] iwlwifi: dbg: work around clang bug by marking debug strings static

[Nick Desaulniers]

Commit r353569 in prerelease Clang-9 is producing a linkage failure:

ld: drivers/net/wireless/intel/iwlwifi/fw/dbg.o:
in function `_iwl_fw_dbg_apply_point':
dbg.c:(.text+0x827a): undefined reference to `__compiletime_assert_2387'

when the following configs are enabled:
- CONFIG_IWLWIFI
- CONFIG_IWLMVM
- CONFIG_KASAN

Work around the issue for now by marking the debug strings as `static`,
which they probably should be any ways.

Link: https://bugs.llvm.org/show_bug.cgi?id=42580
Link: https://github.com/ClangBuiltLinux/linux/issues/580
Reported-by: Arnd Bergmann <arnd@xxxxxxxx>
Reported-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
---
 drivers/net/wireless/intel/iwlwifi/fw/dbg.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
index e411ac98290d..f8c90ea4e9b4 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
@@ -2438,7 +2438,7 @@ static void iwl_fw_dbg_info_apply(struct iwl_fw_runtime *fwrt,
 {
 	u32 img_name_len = le32_to_cpu(dbg_info->img_name_len);
 	u32 dbg_cfg_name_len = le32_to_cpu(dbg_info->dbg_cfg_name_len);
-	const char err_str[] =
+	static const char err_str[] =
 		"WRT: ext=%d. Invalid %s name length %d, expected %d\n";
 
 	if (img_name_len != IWL_FW_INI_MAX_IMG_NAME_LEN) {
@@ -2775,7 +2775,7 @@ static void _iwl_fw_dbg_apply_point(struct iwl_fw_runtime *fwrt,
 		struct iwl_ucode_tlv *tlv = iter;
 		void *ini_tlv = (void *)tlv->data;
 		u32 type = le32_to_cpu(tlv->type);
-		const char invalid_ap_str[] =
+		static const char invalid_ap_str[] =
 			"WRT: ext=%d. Invalid apply point %d for %s\n";
 
 		switch (type) {
-- 
2.22.0.410.gd8fdbe21b5-goog