[PATCH v16 23/38] x86: Allow WARN_trap() macro to be included in pre-boot environments

[Ross Philipson]

For pre-boot environments, do not use the static call definition of the
WARN_trap() macro.

Suggested-by: Peter Zijlstra <peterz at infradead.org>
Signed-off-by: Ross Philipson <ross.philipson at gmail.com>
---
 arch/x86/include/asm/bug.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/bug.h b/arch/x86/include/asm/bug.h
index 80c1696d8d59..7899768ae644 100644
--- a/arch/x86/include/asm/bug.h
+++ b/arch/x86/include/asm/bug.h
@@ -138,8 +138,14 @@ do {									\
 #ifdef HAVE_ARCH_BUG_FORMAT_ARGS
 
 #ifndef __ASSEMBLER__
+
+#ifndef __DISABLE_EXPORTS
 #include <linux/static_call_types.h>
 DECLARE_STATIC_CALL(WARN_trap, __WARN_trap);
+#define WARN_trap(...)	static_call_mod(WARN_trap)(__VA_ARGS__)
+#else /* __DISABLE_EXPORTS */
+#define WARN_trap(...)	__WARN_trap(__VA_ARGS__)
+#endif /* __DISABLE_EXPORTS */
 
 struct pt_regs;
 struct sysv_va_list { /* from AMD64 System V ABI */
@@ -172,7 +178,7 @@ extern void *__warn_args(struct arch_va_list *args, struct pt_regs *regs);
 #define __WARN_print_arg(flags, format, arg...)				\
 do {									\
 	int __flags = (flags) | BUGFLAG_WARNING | BUGFLAG_ARGS ;	\
-	static_call_mod(WARN_trap)(__WARN_bug_entry(__flags, format), ## arg); \
+	WARN_trap(__WARN_bug_entry(__flags, format), ## arg);		\
 	asm (""); /* inhibit tail-call optimization */			\
 } while (0)
 
-- 
2.47.3