EVOLUTION-MANAGER

Edit File: autoconf-relay_buf-per_cpu_ptr.c

// // The following kernel commit: // // commit 017c59c042d01fc84cae7a8ea475861e702c77ab // Author: Akash Goel <akash.goel@intel.com> // Date: Fri Sep 2 21:47:38 2016 +0200 // // relay: Use per CPU constructs for the relay channel buffer pointers // // relay essentially needs to maintain a per CPU array of channel buffer // pointers but it manually creates that array. Instead its better to use // the per CPU constructs, provided by the kernel, to allocate & access the // array of pointer to channel buffers. // // changed the way the 'rchan->buf' field works. It just to be a // regular array, and is now a per_cpu_ptr-style array. #include <linux/relay.h> #include <linux/percpu.h> #include <linux/bug.h> struct rchan_buf *relay_buf_test(struct rchan *chan, unsigned int cpu) { BUILD_BUG_ON(sizeof(chan->buf) != sizeof(struct rchan_buf **)); return *per_cpu_ptr(chan->buf, cpu); }