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</o:shapelayout></xml><![endif]--></head><body lang=KO link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Hello all,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>I’m almost sure but want to check if my understanding is correct.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>To use a memory mapped IO, we use functions like request_mem_region and ioremap, iounmap functions. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>I guess when we call ioremap function, the kernel sets up page table for the region so that the region becomes non-cacheable, and I don’t also have to worry about reordering problem. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Is my understanding correct?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Thanks!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Chan Kim<o:p></o:p></span></p></div></body></html>