(gdb) list *stream_enc_dma_append+0xcc
0x531 is in stream_enc_dma_append (include/asm/io_32.h:175).
170     {
171             return *(volatile unsigned short __force *) addr;
172     }
173     static inline unsigned int readl(const volatile void __iomem *addr)
174     {
175             return *(volatile unsigned int __force *) addr;
176     }
177     #define readb_relaxed(addr) readb(addr)
178     #define readw_relaxed(addr) readw(addr)
179     #define readl_relaxed(addr) readl(addr)