qemu-log: Remove qemu_log_try_set_file() and its users

Remove the function qemu_log_try_set_file() and its users (which
are all in TCG code generation functions for various targets).
This function was added to abstract out code which was originally
written as "if (!logfile) logfile = stderr;" in order that BUG:
case code which did an unguarded "fprintf(logfile, ...)" would
not crash if debug logging was not enabled. Since those direct
uses of logfile have also been abstracted away into qemu_log()
calls which check for a NULL logfile, there is no need for the
target-* files to mess with the user's chosen logging settings.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NAndreas Färber <afaerber@suse.de>
Acked-by: NMichael Walle <michael@walle.cc>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

include/qemu/log.h

@@ -126,14 +126,6 @@ static inline void qemu_log_set_file(FILE *f)
     qemu_logfile = f;
 }
 
-/* Set up a new log file, only if none is set */
-static inline void qemu_log_try_set_file(FILE *f)
-{
-    if (!qemu_logfile) {
-        qemu_logfile = f;
-    }
-}
-
 /* define log items */
 typedef struct QEMULogItem {
     int mask;

target-cris/translate.c

@@ -3215,8 +3215,6 @@ gen_intermediate_code_internal(CPUCRISState *env, TranslationBlock *tb,
     int num_insns;
     int max_insns;
 
-    qemu_log_try_set_file(stderr);
-
     if (env->pregs[PR_VR] == 32) {
         dc->decoder = crisv32_decoder;
         dc->clear_locked_irq = 0;

target-lm32/translate.c

@@ -1012,8 +1012,6 @@ static void gen_intermediate_code_internal(CPULM32State *env,
     int num_insns;
     int max_insns;
 
-    qemu_log_try_set_file(stderr);
-
     pc_start = tb->pc;
     dc->env = env;
     dc->tb = tb;

target-microblaze/translate.c

@@ -1734,8 +1734,6 @@ gen_intermediate_code_internal(CPUMBState *env, TranslationBlock *tb,
     int num_insns;
     int max_insns;
 
-    qemu_log_try_set_file(stderr);
-
     pc_start = tb->pc;
     dc->env = env;
     dc->tb = tb;

target-openrisc/translate.c

@@ -1670,8 +1670,6 @@ static inline void gen_intermediate_code_internal(OpenRISCCPU *cpu,
     int num_insns;
     int max_insns;
 
-    qemu_log_try_set_file(stderr);
-
     pc_start = tb->pc;
     dc->tb = tb;