On Thu, 24 Aug 2023 11:04:16 +0200, Thomas Gleixner wrote: > On Thu, Aug 24 2023 at 00:27, huangshaobo3@xxxxxxxxxx wrote: > > On Wed, 23 Aug 2023 16:15:27 +0200, Thomas Gleixner wrote: > >> I'm not seeing what this solves: > > > >> > - if (control & PCI_MSI_FLAGS_64BIT) > >> > + if (desc.pci.msi_attrib.is_64) > > > >> Both variants resolve to a test of a bit and a conditional instruction > >> on the result. It's exactly zero difference in terms of "calculation". > > > >> So all this does is change the memory location to test. Not more not > >> less. It does not generate better code and does not save anything. > > > > It may not be appropriate to write to eliminate duplicate calculations, > > can it be proposed again with clean code? > > What's wrong with the existing code? There is nothing wrong with the current code, using desc.pci.msi_attrib.is_64 does not solve any problems, thank you very much for reviewing comments. Thanks, sparkhuang #/******±¾Óʼþ¼°Æ丽¼þº¬ÓÐСÃ×¹«Ë¾µÄ±£ÃÜÐÅÏ¢£¬½öÏÞÓÚ·¢Ë͸øÉÏÃæµØÖ·ÖÐÁгöµÄ¸öÈË»òȺ×é¡£½ûÖ¹ÈκÎÆäËûÈËÒÔÈκÎÐÎʽʹÓ㨰üÀ¨µ«²»ÏÞÓÚÈ«²¿»ò²¿·ÖµØй¶¡¢¸´ÖÆ¡¢»òÉ¢·¢£©±¾ÓʼþÖеÄÐÅÏ¢¡£Èç¹ûÄú´íÊÕÁ˱¾Óʼþ£¬ÇëÄúÁ¢¼´µç»°»òÓʼþ֪ͨ·¢¼þÈ˲¢É¾³ý±¾Óʼþ£¡ This e-mail and its attachments contain confidential information from XIAOMI, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it!******/#
