tools: Adopt __printf from kernel sources

index a3deb74..f531b25 100644
@@ -21,3 +21,5 @@
 #define __must_be_array(a)	BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
 
 #define __noreturn	__attribute__((noreturn))
+
+#define __printf(a, b)	__attribute__((format(printf, a, b)))

index 29361d9..02a649b 100644
@@ -17,6 +17,7 @@
 
 #include <api/fs/fs.h>
 #include <linux/bitops.h>
+#include <linux/compiler.h>
 #include <linux/coresight-pmu.h>
 #include <linux/kernel.h>
 #include <linux/log2.h>

@@ -583,8 +584,7 @@ static FILE *cs_device__open_file(const char *name)
 
 }
 
-static __attribute__((format(printf, 2, 3)))
-int cs_device__print_file(const char *name, const char *fmt, ...)
+static int __printf(2, 3) cs_device__print_file(const char *name, const char *fmt, ...)
 {
 	va_list args;
 	FILE *file;

index 0328f29..0175765 100644
@@ -5,6 +5,7 @@
 #include <subcmd/pager.h>
 #include "../ui/ui.h"
 
+#include <linux/compiler.h>
 #include <linux/string.h>
 
 #define CMD_EXEC_PATH "--exec-path"

@@ -24,6 +25,6 @@ static inline int is_absolute_path(const char *path)
 	return path[0] == '/';
 }
 
-char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
+char *mkpath(const char *fmt, ...) __printf(1, 2);
 
 #endif /* __PERF_CACHE_H */

index 8a23ea1..c818bdb 100644
@@ -4,6 +4,7 @@
 
 #include <stdbool.h>
 #include <string.h>
+#include <linux/compiler.h>
 #include "event.h"
 #include "../ui/helpline.h"
 #include "../ui/progress.h"

@@ -40,16 +41,16 @@ extern int debug_data_convert;
 
 #define STRERR_BUFSIZE	128	/* For the buffer size of str_error_r */
 
-int dump_printf(const char *fmt, ...) __attribute__((format(printf, 1, 2)));
+int dump_printf(const char *fmt, ...) __printf(1, 2);
 void trace_event(union perf_event *event);
 
-int ui__error(const char *format, ...) __attribute__((format(printf, 1, 2)));
-int ui__warning(const char *format, ...) __attribute__((format(printf, 1, 2)));
+int ui__error(const char *format, ...) __printf(1, 2);
+int ui__warning(const char *format, ...) __printf(1, 2);
 
 void pr_stat(const char *fmt, ...);
 
-int eprintf(int level, int var, const char *fmt, ...) __attribute__((format(printf, 3, 4)));
-int eprintf_time(int level, int var, u64 t, const char *fmt, ...) __attribute__((format(printf, 4, 5)));
+int eprintf(int level, int var, const char *fmt, ...) __printf(3, 4);
+int eprintf_time(int level, int var, u64 t, const char *fmt, ...) __printf(4, 5);
 int veprintf(int level, int var, const char *fmt, va_list args);
 
 int perf_debug_option(const char *str);

index debe751..45b64f9 100644
@@ -16,6 +16,7 @@
 #ifndef INCLUDE__INTEL_PT_LOG_H__
 #define INCLUDE__INTEL_PT_LOG_H__
 
+#include <linux/compiler.h>
 #include <stdint.h>
 #include <inttypes.h>
 

@@ -34,8 +35,7 @@ void __intel_pt_log_insn(struct intel_pt_insn *intel_pt_insn, uint64_t ip);
 void __intel_pt_log_insn_no_data(struct intel_pt_insn *intel_pt_insn,
 				 uint64_t ip);
 
-__attribute__((format(printf, 1, 2)))
-void __intel_pt_log(const char *fmt, ...);
+void __intel_pt_log(const char *fmt, ...) __printf(1, 2);
 
 #define intel_pt_log(fmt, ...) \
 	do { \

index 3738426..5812947 100644
@@ -1,6 +1,7 @@
 #ifndef _PROBE_EVENT_H
 #define _PROBE_EVENT_H
 
+#include <linux/compiler.h>
 #include <stdbool.h>
 #include "intlist.h"
 

@@ -171,8 +172,7 @@ void arch__fix_tev_from_maps(struct perf_probe_event *pev,
 			     struct symbol *sym);
 
 /* If there is no space to write, returns -E2BIG. */
-int e_snprintf(char *str, size_t size, const char *format, ...)
-	__attribute__((format(printf, 3, 4)));
+int e_snprintf(char *str, size_t size, const char *format, ...) __printf(3, 4);
 
 /* Maximum index number of event-name postfix */
 #define MAX_EVENT_INDEX	1024

index 318424e..802d743 100644
@@ -42,6 +42,7 @@
 #include <stdarg.h>
 #include <stddef.h>
 #include <string.h>
+#include <linux/compiler.h>
 #include <sys/types.h>
 
 extern char strbuf_slopbuf[];

@@ -85,8 +86,7 @@ static inline int strbuf_addstr(struct strbuf *sb, const char *s) {
 	return strbuf_add(sb, s, strlen(s));
 }
 
-__attribute__((format(printf,2,3)))
-int strbuf_addf(struct strbuf *sb, const char *fmt, ...);
+int strbuf_addf(struct strbuf *sb, const char *fmt, ...) __printf(2, 3);
 
 /* XXX: if read fails, any partial read is undone */
 ssize_t strbuf_read(struct strbuf *, int fd, ssize_t hint);

index 024b108..21c6db1 100644
@@ -14,17 +14,11 @@
 #include <linux/compiler.h>
 #include <linux/types.h>
 
-#ifndef __GNUC__
-#ifndef __attribute__
-#define __attribute__(x)
-#endif
-#endif
-
 /* General helper functions */
 void usage(const char *err) __noreturn;
-void die(const char *err, ...) __noreturn __attribute__((format (printf, 1, 2)));
-int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
-void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
+void die(const char *err, ...) __noreturn __printf(1, 2);
+int error(const char *err, ...) __printf(1, 2);
+void warning(const char *err, ...) __printf(1, 2);
 
 void set_warning_routine(void (*routine)(const char *err, va_list params));