[PATCH V3 3/4] ARM: Xilinx: base header files and assembly macros

On 02/17/2011 02:01 AM, Jamie Iles wrote:

quoted

+
+static void putc(char ch)
+{
+	/*
+	 * Wait for room in the FIFO, then write the char into the FIFO
+	 */
+	while (UART_STATUS(LL_UART_PADDR) & UART_SR_TXFULL)
+		;

It might be worth adding a barrier() call to these loops to be explicit 
about the volatility.

I think you want cpu_relax() then.

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