Module Name: src Committed By: riastradh Date: Sat Feb 25 00:33:27 UTC 2023
Modified Files: src/sys/arch/xen/xen: xencons.c Log Message: xencons(4): Membar audit. - xenconscn_getc: Once we have consumed an input slot, it is clearer to issue xen_wmb (release, i.e., load/store-before-store) before advancing in_cons so that the update becomes a store-release freeing the input slot for the other side to reuse. - xenconscn_putc: After filling an output slot, must issue xen_wmb (release, i.e., load/store-before-store) before advancing out_prod, and another one before notifying the other side of the advance. To generate a diff of this commit: cvs rdiff -u -r1.50 -r1.51 src/sys/arch/xen/xen/xencons.c Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.