Replace nxsem API when used as a lock with nxmutex API

Signed-off-by: anjiahao <anjiahao@xiaomi.com>
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

fs/mmap/fs_munmap.c

@@ -52,7 +52,7 @@ static int file_munmap_(FAR void *start, size_t length, bool kernel)
 
   /* Find a region containing this start and length in the list of regions */
 
-  ret = nxsem_wait(&g_rammaps.exclsem);
+  ret = nxmutex_lock(&g_rammaps.lock);
   if (ret < 0)
     {
       return ret;
@@ -78,7 +78,7 @@ static int file_munmap_(FAR void *start, size_t length, bool kernel)
     {
       ferr("ERROR: Region not found\n");
       ret = -EINVAL;
-      goto errout_with_semaphore;
+      goto errout_with_lock;
     }
 
   /* Get the offset from the beginning of the region and the actual number
@@ -93,7 +93,7 @@ static int file_munmap_(FAR void *start, size_t length, bool kernel)
     {
       ferr("ERROR: Cannot umap without unmapping to the end\n");
       ret = -ENOSYS;
-      goto errout_with_semaphore;
+      goto errout_with_lock;
     }
 
   /* Okay.. the region is beging umapped to the end.  Make sure the length
@@ -151,11 +151,11 @@ static int file_munmap_(FAR void *start, size_t length, bool kernel)
       curr->length = length;
     }
 
-  nxsem_post(&g_rammaps.exclsem);
+  nxmutex_unlock(&g_rammaps.lock);
   return OK;
 
-errout_with_semaphore:
-  nxsem_post(&g_rammaps.exclsem);
+errout_with_lock:
+  nxmutex_unlock(&g_rammaps.lock);
   return ret;
 #else
   return OK;

fs/mmap/fs_rammap.c

@@ -48,7 +48,7 @@
 
 struct fs_allmaps_s g_rammaps =
 {
-  SEM_INITIALIZER(1)
+  NXMUTEX_INITIALIZER
 };
 
 /****************************************************************************
@@ -180,7 +180,7 @@ int rammap(FAR struct file *filep, size_t length,
 
   /* Add the buffer to the list of regions */
 
-  ret = nxsem_wait(&g_rammaps.exclsem);
+  ret = nxmutex_lock(&g_rammaps.lock);
   if (ret < 0)
     {
       goto errout_with_region;
@@ -189,7 +189,7 @@ int rammap(FAR struct file *filep, size_t length,
   map->flink = g_rammaps.head;
   g_rammaps.head = map;
 
-  nxsem_post(&g_rammaps.exclsem);
+  nxmutex_unlock(&g_rammaps.lock);
   *mapped = map->addr;
   return OK;
 

fs/mmap/fs_rammap.h

@@ -28,7 +28,7 @@
 #include <nuttx/config.h>
 
 #include <sys/types.h>
-#include <nuttx/semaphore.h>
+#include <nuttx/mutex.h>
 
 #ifdef CONFIG_FS_RAMMAP
 
@@ -65,7 +65,7 @@ struct fs_rammap_s
 
 struct fs_allmaps_s
 {
-  sem_t               exclsem;     /* Provides exclusive access the list */
+  mutex_t             lock;        /* Provides exclusive access the list */
   struct fs_rammap_s *head;        /* List of mapped files */
 };