perf jit: Constify filename argument

Make it clearer the argument is just being used as a string.

Signed-off-by: Ian Rogers <[e-mail]>
Cc: Adrian Hunter <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Anne Macedo <[e-mail]>
Cc: Arnd Bergmann <[e-mail]>
Cc: Athira Rajeev <[e-mail]>
Cc: Casey Chen <[e-mail]>
Cc: Chaitanya S Prakash <[e-mail]>
Cc: Colin Ian King <[e-mail]>
Cc: Dominique Martinet <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: James Clark <[e-mail]>
Cc: Jann Horn <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Kan Liang <[e-mail]>
Cc: Mark Rutland <[e-mail]>
Cc: Masahiro Yamada <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Sun Haiyong <[e-mail]>
Cc: Weilin Wang <[e-mail]>
Cc: Yang Jihong <[e-mail]>
Cc: Yunseong Kim <[e-mail]>
Cc: Ze Gao <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/util/jit.h

···
 #include <data.h>
 
 int jit_process(struct perf_session *session, struct perf_data *output,
-		struct machine *machine, char *filename, pid_t pid, pid_t tid, u64 *nbytes);
+		struct machine *machine, const char *filename,
+		pid_t pid, pid_t tid, u64 *nbytes);
 
 int jit_inject_record(const char *filename);
 

tools/perf/util/jitdump.c

···
 }
 
 static int
-jit_inject(struct jit_buf_desc *jd, char *path)
+jit_inject(struct jit_buf_desc *jd, const char *path)
 {
 	int ret;
 
···
  * as captured in the RECORD_MMAP record
  */
 static int
-jit_detect(char *mmap_name, pid_t pid, struct nsinfo *nsi)
+jit_detect(const char *mmap_name, pid_t pid, struct nsinfo *nsi)
  {
 	char *p;
 	char *end = NULL;
···
 jit_process(struct perf_session *session,
 	    struct perf_data *output,
 	    struct machine *machine,
-	    char *filename,
+	    const char *filename,
 	    pid_t pid,
 	    pid_t tid,
 	    u64 *nbytes)