3 files changed, 74 insertions, 29 deletions

diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h
index ee76552c06..02c1ce6a5d 100644
--- a/include/qemu/bitops.h
+++ b/include/qemu/bitops.h
@@ -424,13 +424,16 @@ static inline uint64_t deposit64(uint64_t value, int start, int length,
 
 /**
  * half_shuffle32:
- * @value: 32-bit value (of which only the bottom 16 bits are of interest)
+ * @x: 32-bit value (of which only the bottom 16 bits are of interest)
+ *
+ * Given an input value::
+ *
+ *   xxxx xxxx xxxx xxxx ABCD EFGH IJKL MNOP
  *
- * Given an input value:
- *  xxxx xxxx xxxx xxxx ABCD EFGH IJKL MNOP
  * return the value where the bottom 16 bits are spread out into
- * the odd bits in the word, and the even bits are zeroed:
- *  0A0B 0C0D 0E0F 0G0H 0I0J 0K0L 0M0N 0O0P
+ * the odd bits in the word, and the even bits are zeroed::
+ *
+ *   0A0B 0C0D 0E0F 0G0H 0I0J 0K0L 0M0N 0O0P
  *
  * Any bits set in the top half of the input are ignored.
  *
@@ -450,13 +453,16 @@ static inline uint32_t half_shuffle32(uint32_t x)
 
 /**
  * half_shuffle64:
- * @value: 64-bit value (of which only the bottom 32 bits are of interest)
+ * @x: 64-bit value (of which only the bottom 32 bits are of interest)
+ *
+ * Given an input value::
+ *
+ *   xxxx xxxx xxxx .... xxxx xxxx ABCD EFGH IJKL MNOP QRST UVWX YZab cdef
  *
- * Given an input value:
- *  xxxx xxxx xxxx .... xxxx xxxx ABCD EFGH IJKL MNOP QRST UVWX YZab cdef
  * return the value where the bottom 32 bits are spread out into
- * the odd bits in the word, and the even bits are zeroed:
- *  0A0B 0C0D 0E0F 0G0H 0I0J 0K0L 0M0N .... 0U0V 0W0X 0Y0Z 0a0b 0c0d 0e0f
+ * the odd bits in the word, and the even bits are zeroed::
+ *
+ *   0A0B 0C0D 0E0F 0G0H 0I0J 0K0L 0M0N .... 0U0V 0W0X 0Y0Z 0a0b 0c0d 0e0f
  *
  * Any bits set in the top half of the input are ignored.
  *
@@ -477,13 +483,16 @@ static inline uint64_t half_shuffle64(uint64_t x)
 
 /**
  * half_unshuffle32:
- * @value: 32-bit value (of which only the odd bits are of interest)
+ * @x: 32-bit value (of which only the odd bits are of interest)
+ *
+ * Given an input value::
+ *
+ *   xAxB xCxD xExF xGxH xIxJ xKxL xMxN xOxP
  *
- * Given an input value:
- *  xAxB xCxD xExF xGxH xIxJ xKxL xMxN xOxP
  * return the value where all the odd bits are compressed down
- * into the low half of the word, and the high half is zeroed:
- *  0000 0000 0000 0000 ABCD EFGH IJKL MNOP
+ * into the low half of the word, and the high half is zeroed::
+ *
+ *   0000 0000 0000 0000 ABCD EFGH IJKL MNOP
  *
  * Any even bits set in the input are ignored.
  *
@@ -504,13 +513,16 @@ static inline uint32_t half_unshuffle32(uint32_t x)
 
 /**
  * half_unshuffle64:
- * @value: 64-bit value (of which only the odd bits are of interest)
+ * @x: 64-bit value (of which only the odd bits are of interest)
+ *
+ * Given an input value::
+ *
+ *   xAxB xCxD xExF xGxH xIxJ xKxL xMxN .... xUxV xWxX xYxZ xaxb xcxd xexf
  *
- * Given an input value:
- *  xAxB xCxD xExF xGxH xIxJ xKxL xMxN .... xUxV xWxX xYxZ xaxb xcxd xexf
  * return the value where all the odd bits are compressed down
- * into the low half of the word, and the high half is zeroed:
- *  0000 0000 0000 .... 0000 0000 ABCD EFGH IJKL MNOP QRST UVWX YZab cdef
+ * into the low half of the word, and the high half is zeroed::
+ *
+ *   0000 0000 0000 .... 0000 0000 ABCD EFGH IJKL MNOP QRST UVWX YZab cdef
  *
  * Any even bits set in the input are ignored.
  *
diff --git a/include/qemu/error-report.h b/include/qemu/error-report.h
index 00d069b20f..87532d8596 100644
--- a/include/qemu/error-report.h
+++ b/include/qemu/error-report.h
@@ -73,6 +73,7 @@ void error_init(const char *argv0);
     })
 
 const char *error_get_progname(void);
-extern bool enable_timestamp_msg;
+
+extern bool error_with_timestamp;
 
 #endif
diff --git a/include/qemu/log.h b/include/qemu/log.h
index a91105b2ad..e0f4e40628 100644
--- a/include/qemu/log.h
+++ b/include/qemu/log.h
@@ -3,9 +3,16 @@
 
 /* A small part of this API is split into its own header */
 #include "qemu/log-for-trace.h"
+#include "qemu/rcu.h"
+
+typedef struct QemuLogFile {
+    struct rcu_head rcu;
+    FILE *fd;
+} QemuLogFile;
 
 /* Private global variable, don't use */
-extern FILE *qemu_logfile;
+extern QemuLogFile *qemu_logfile;
+
 
 /* 
  * The new API:
@@ -25,7 +32,16 @@ static inline bool qemu_log_enabled(void)
  */
 static inline bool qemu_log_separate(void)
 {
-    return qemu_logfile != NULL && qemu_logfile != stderr;
+    QemuLogFile *logfile;
+    bool res = false;
+
+    rcu_read_lock();
+    logfile = atomic_rcu_read(&qemu_logfile);
+    if (logfile && logfile->fd != stderr) {
+        res = true;
+    }
+    rcu_read_unlock();
+    return res;
 }
 
 #define CPU_LOG_TB_OUT_ASM (1 << 0)
@@ -53,14 +69,25 @@ static inline bool qemu_log_separate(void)
  * qemu_loglevel is never set when qemu_logfile is unset.
  */
 
-static inline void qemu_log_lock(void)
+static inline FILE *qemu_log_lock(void)
 {
-    qemu_flockfile(qemu_logfile);
+    QemuLogFile *logfile;
+    rcu_read_lock();
+    logfile = atomic_rcu_read(&qemu_logfile);
+    if (logfile) {
+        qemu_flockfile(logfile->fd);
+        return logfile->fd;
+    } else {
+        return NULL;
+    }
 }
 
-static inline void qemu_log_unlock(void)
+static inline void qemu_log_unlock(FILE *fd)
 {
-    qemu_funlockfile(qemu_logfile);
+    if (fd) {
+        qemu_funlockfile(fd);
+    }
+    rcu_read_unlock();
 }
 
 /* Logging functions: */
@@ -70,9 +97,14 @@ static inline void qemu_log_unlock(void)
 static inline void GCC_FMT_ATTR(1, 0)
 qemu_log_vprintf(const char *fmt, va_list va)
 {
-    if (qemu_logfile) {
-        vfprintf(qemu_logfile, fmt, va);
+    QemuLogFile *logfile;
+
+    rcu_read_lock();
+    logfile = atomic_rcu_read(&qemu_logfile);
+    if (logfile) {
+        vfprintf(logfile->fd, fmt, va);
     }
+    rcu_read_unlock();
 }
 
 /* log only if a bit is set on the current loglevel mask: