esp_ringbuf: Added functions to linker.lf file which can be placed in Flash

This commit adds symbols from the ringbuf.c file which can be placed in
Flash in order to free up IRAM space.

components/esp_ringbuf/Kconfig

@@ -11,14 +11,15 @@ menu "ESP Ringbuf"
 
     config RINGBUF_PLACE_ISR_FUNCTIONS_INTO_FLASH
         bool "Place ISR ringbuf functions into flash"
+        depends on RINGBUF_PLACE_FUNCTIONS_INTO_FLASH
         default n
         help
-            Place non-ISR ringbuf functions (like xRingbufferSendFromISR/xRingbufferReceiveFromISR) into flash.
+            Place ISR ringbuf functions (like xRingbufferSendFromISR/xRingbufferReceiveFromISR) into flash.
             This frees up IRAM, but the functions can no longer be called when the cache is disabled
             or from an IRAM interrupt context.
 
-            This option is not compatible with ESP-IDF drivers which is configured to run the ISR from an IRAM context,
-            e.g. CONFIG_UART_ISR_IN_IRAM.
+            This option is not compatible with ESP-IDF drivers which are configured to
+            run the ISR from an IRAM context, e.g. CONFIG_UART_ISR_IN_IRAM.
 
 
 endmenu

components/esp_ringbuf/linker.lf

@@ -8,17 +8,25 @@ entries:
         ringbuf: prvGetCurMaxSizeByteBuf (default)
         ringbuf: prvInitializeNewRingbuffer (default)
         ringbuf: prvReceiveGeneric (default)
+        ringbuf: prvSendAcquireGeneric (default)
+        ringbuf: prvGetFreeSize (default)
         ringbuf: vRingbufferDelete (default)
         ringbuf: vRingbufferGetInfo (default)
         ringbuf: vRingbufferReturnItem (default)
         ringbuf: xRingbufferAddToQueueSetRead (default)
         ringbuf: xRingbufferCreate (default)
         ringbuf: xRingbufferCreateStatic (default)
+        ringbuf: xRingbufferCreateNoSplit (default)
         ringbuf: xRingbufferReceive (default)
         ringbuf: xRingbufferReceiveSplit (default)
         ringbuf: xRingbufferReceiveUpTo (default)
         ringbuf: xRingbufferRemoveFromQueueSetRead (default)
         ringbuf: xRingbufferSend (default)
+        ringbuf: xRingbufferSendAcquire (default)
+        ringbuf: xRingbufferSendComplete (default)
+        ringbuf: xRingbufferPrintInfo (default)
+        ringbuf: xRingbufferGetMaxItemSize (default)
+        ringbuf: xRingbufferGetCurFreeSize (default)
 
     if RINGBUF_PLACE_ISR_FUNCTIONS_INTO_FLASH = y:
         ringbuf: prvReturnItemByteBuf (default)
@@ -31,7 +39,9 @@ entries:
         ringbuf: prvAcquireItemNoSplit (default)
         ringbuf: prvCheckItemFitsByteBuffer (default)
         ringbuf: prvCheckItemFitsDefault (default)
+        ringbuf: prvCheckItemAvail (default)
         ringbuf: prvSendItemDoneNoSplit (default)
+        ringbuf: prvReceiveGenericFromISR (default)
         ringbuf: xRingbufferSendFromISR (default)
         ringbuf: xRingbufferReceiveFromISR (default)
         ringbuf: xRingbufferReceiveSplitFromISR (default)