tree: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next head: b072ae74df177c3ad7704c5fbe66e3f10aad9d4e commit: b072ae74df177c3ad7704c5fbe66e3f10aad9d4e [12/12] vhost: use vhost_desc instead of vhost_log config: s390-debug_defconfig (attached as .config) compiler: s390-linux-gcc (GCC) 7.5.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout b072ae74df177c3ad7704c5fbe66e3f10aad9d4e # save the attached .config to linux build tree GCC_VERSION=7.5.0 make.cross ARCH=s390
If you fix the issue, kindly add following tag Reported-by: kbuild test robot <[email protected]> All warnings (new ones prefixed by >>): In file included from include/linux/list.h:9:0, from include/linux/wait.h:7, from include/linux/eventfd.h:13, from drivers/vhost/vhost.c:13: drivers/vhost/vhost.c: In function 'vhost_log_write': include/linux/kernel.h:844:29: warning: comparison of distinct pointer types lacks a cast (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1))) ^ include/linux/kernel.h:858:4: note: in expansion of macro '__typecheck' (__typecheck(x, y) && __no_side_effects(x, y)) ^~~~~~~~~~~ include/linux/kernel.h:868:24: note: in expansion of macro '__safe_cmp' __builtin_choose_expr(__safe_cmp(x, y), \ ^~~~~~~~~~ include/linux/kernel.h:877:19: note: in expansion of macro '__careful_cmp' #define min(x, y) __careful_cmp(x, y, <) ^~~~~~~~~~~~~ >> drivers/vhost/vhost.c:1968:11: note: in expansion of macro 'min' u64 l = min(log[i].len, len); ^~~ vim +/min +1968 drivers/vhost/vhost.c cc5e710759470b Jason Wang 2019-01-16 1948 b072ae74df177c Michael S. Tsirkin 2019-12-11 1949 int vhost_log_write(struct vhost_virtqueue *vq, struct vhost_desc *log, cc5e710759470b Jason Wang 2019-01-16 1950 unsigned int log_num, u64 len, struct iovec *iov, int count) 3a4d5c94e95935 Michael S. Tsirkin 2010-01-14 1951 { 3a4d5c94e95935 Michael S. Tsirkin 2010-01-14 1952 int i, r; 3a4d5c94e95935 Michael S. Tsirkin 2010-01-14 1953 3a4d5c94e95935 Michael S. Tsirkin 2010-01-14 1954 /* Make sure data written is seen before log. */ 5659338c88963e Michael S. Tsirkin 2010-02-01 1955 smp_wmb(); cc5e710759470b Jason Wang 2019-01-16 1956 cc5e710759470b Jason Wang 2019-01-16 1957 if (vq->iotlb) { cc5e710759470b Jason Wang 2019-01-16 1958 for (i = 0; i < count; i++) { cc5e710759470b Jason Wang 2019-01-16 1959 r = log_write_hva(vq, (uintptr_t)iov[i].iov_base, cc5e710759470b Jason Wang 2019-01-16 1960 iov[i].iov_len); cc5e710759470b Jason Wang 2019-01-16 1961 if (r < 0) cc5e710759470b Jason Wang 2019-01-16 1962 return r; cc5e710759470b Jason Wang 2019-01-16 1963 } cc5e710759470b Jason Wang 2019-01-16 1964 return 0; cc5e710759470b Jason Wang 2019-01-16 1965 } cc5e710759470b Jason Wang 2019-01-16 1966 3a4d5c94e95935 Michael S. Tsirkin 2010-01-14 1967 for (i = 0; i < log_num; ++i) { 3a4d5c94e95935 Michael S. Tsirkin 2010-01-14 @1968 u64 l = min(log[i].len, len); 3a4d5c94e95935 Michael S. Tsirkin 2010-01-14 1969 r = log_write(vq->log_base, log[i].addr, l); 3a4d5c94e95935 Michael S. Tsirkin 2010-01-14 1970 if (r < 0) 3a4d5c94e95935 Michael S. Tsirkin 2010-01-14 1971 return r; 3a4d5c94e95935 Michael S. Tsirkin 2010-01-14 1972 len -= l; 5786aee8bf6d74 Michael S. Tsirkin 2010-09-22 1973 if (!len) { 3a4d5c94e95935 Michael S. Tsirkin 2010-01-14 1974 if (vq->log_ctx) 3a4d5c94e95935 Michael S. Tsirkin 2010-01-14 1975 eventfd_signal(vq->log_ctx, 1); 5786aee8bf6d74 Michael S. Tsirkin 2010-09-22 1976 return 0; 5786aee8bf6d74 Michael S. Tsirkin 2010-09-22 1977 } 5786aee8bf6d74 Michael S. Tsirkin 2010-09-22 1978 } 3a4d5c94e95935 Michael S. Tsirkin 2010-01-14 1979 /* Length written exceeds what we have stored. This is a bug. */ 3a4d5c94e95935 Michael S. Tsirkin 2010-01-14 1980 BUG(); 3a4d5c94e95935 Michael S. Tsirkin 2010-01-14 1981 return 0; 3a4d5c94e95935 Michael S. Tsirkin 2010-01-14 1982 } 6ac1afbf6132df Asias He 2013-05-06 1983 EXPORT_SYMBOL_GPL(vhost_log_write); 3a4d5c94e95935 Michael S. Tsirkin 2010-01-14 1984 :::::: The code at line 1968 was first introduced by commit :::::: 3a4d5c94e959359ece6d6b55045c3f046677f55c vhost_net: a kernel-level virtio server :::::: TO: Michael S. Tsirkin <[email protected]> :::::: CC: David S. Miller <[email protected]> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/[email protected] Intel Corporation
.config.gz
Description: application/gzip
_______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
