Hi Bernard, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: b791d1bdf9212d944d749a5c7ff6febdba241771 commit: 2c8ccb37b08fe364f02a9914daca474d43151453 RDMA/siw: Change CQ flags from 64->32 bits date: 10 months ago config: i386-randconfig-r011-20200612 (attached as .config) compiler: gcc-4.9 (Ubuntu 4.9.3-13ubuntu2) 4.9.3 reproduce (this is a W=1 build): git checkout 2c8ccb37b08fe364f02a9914daca474d43151453 # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): In file included from include/linux/kernel.h:15:0, from include/linux/list.h:9, from include/linux/random.h:10, from include/linux/net.h:18, from drivers/infiniband/sw/siw/siw_qp_rx.c:8: drivers/infiniband/sw/siw/siw_qp_rx.c: In function 'siw_rx_umem': drivers/infiniband/sw/siw/siw_qp_rx.c:43:5: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] (void *)dest_addr, (void *)umem->fp_addr); ^ include/linux/printk.h:306:37: note: in definition of macro 'pr_warning' printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) ^ drivers/infiniband/sw/siw/siw_qp_rx.c:41:4: note: in expansion of macro 'pr_warn' pr_warn("siw: %s: [QP %u]: bogus addr: %p, %pn", ^ drivers/infiniband/sw/siw/siw_qp_rx.c:43:24: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] (void *)dest_addr, (void *)umem->fp_addr); ^ include/linux/printk.h:306:37: note: in definition of macro 'pr_warning' printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) ^ drivers/infiniband/sw/siw/siw_qp_rx.c:41:4: note: in expansion of macro 'pr_warn' pr_warn("siw: %s: [QP %u]: bogus addr: %p, %pn", ^ In file included from include/linux/export.h:45:0, from include/linux/linkage.h:7, from include/linux/kernel.h:8, from include/linux/list.h:9, from include/linux/random.h:10, from include/linux/net.h:18, from drivers/infiniband/sw/siw/siw_qp_rx.c:8: drivers/infiniband/sw/siw/siw_qp_rx.c: In function 'siw_rx_pbl': drivers/infiniband/sw/siw/siw_qp_rx.c:141:23: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] if (siw_rx_kva(srx, (void *)buf_addr, bytes) == bytes) { ^ include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ if (siw_rx_kva(srx, (void *)buf_addr, bytes) == bytes) { ^ drivers/infiniband/sw/siw/siw_qp_rx.c:141:23: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] if (siw_rx_kva(srx, (void *)buf_addr, bytes) == bytes) { ^ include/linux/compiler.h:58:61: note: in definition of macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^ if (siw_rx_kva(srx, (void *)buf_addr, bytes) == bytes) { ^ drivers/infiniband/sw/siw/siw_qp_rx.c:141:23: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] if (siw_rx_kva(srx, (void *)buf_addr, bytes) == bytes) { ^ include/linux/compiler.h:69:3: note: in definition of macro '__trace_if_value' (cond) ? ^ include/linux/compiler.h:56:28: note: in expansion of macro '__trace_if_var' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^ if (siw_rx_kva(srx, (void *)buf_addr, bytes) == bytes) { ^ drivers/infiniband/sw/siw/siw_qp_rx.c: In function 'siw_proc_send': drivers/infiniband/sw/siw/siw_qp_rx.c:488:6: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] (void *)(sge->laddr + frx->sge_off), ^ drivers/infiniband/sw/siw/siw_qp_rx.c: In function 'siw_proc_write': drivers/infiniband/sw/siw/siw_qp_rx.c:601:5: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] (void *)(srx->ddp_to + srx->fpdu_part_rcvd), ^ drivers/infiniband/sw/siw/siw_qp_rx.c: In function 'siw_proc_rresp': drivers/infiniband/sw/siw/siw_qp_rx.c:844:24: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] rv = siw_rx_kva(srx, (void *)(sge->laddr + wqe->processed), ^ vim +/if +141 drivers/infiniband/sw/siw/siw_qp_rx.c 8b6a361b8c482f2 Bernard Metzler 2019-06-20 5 8b6a361b8c482f2 Bernard Metzler 2019-06-20 6 #include <linux/errno.h> 8b6a361b8c482f2 Bernard Metzler 2019-06-20 7 #include <linux/types.h> 8b6a361b8c482f2 Bernard Metzler 2019-06-20 @8 #include <linux/net.h> 8b6a361b8c482f2 Bernard Metzler 2019-06-20 9 #include <linux/scatterlist.h> 8b6a361b8c482f2 Bernard Metzler 2019-06-20 10 #include <linux/highmem.h> 8b6a361b8c482f2 Bernard Metzler 2019-06-20 11 8b6a361b8c482f2 Bernard Metzler 2019-06-20 12 #include <rdma/iw_cm.h> 8b6a361b8c482f2 Bernard Metzler 2019-06-20 13 #include <rdma/ib_verbs.h> 8b6a361b8c482f2 Bernard Metzler 2019-06-20 14 8b6a361b8c482f2 Bernard Metzler 2019-06-20 15 #include "siw.h" 8b6a361b8c482f2 Bernard Metzler 2019-06-20 16 #include "siw_verbs.h" 8b6a361b8c482f2 Bernard Metzler 2019-06-20 17 #include "siw_mem.h" 8b6a361b8c482f2 Bernard Metzler 2019-06-20 18 8b6a361b8c482f2 Bernard Metzler 2019-06-20 19 /* 8b6a361b8c482f2 Bernard Metzler 2019-06-20 20 * siw_rx_umem() 8b6a361b8c482f2 Bernard Metzler 2019-06-20 21 * 8b6a361b8c482f2 Bernard Metzler 2019-06-20 22 * Receive data of @len into target referenced by @dest_addr. 8b6a361b8c482f2 Bernard Metzler 2019-06-20 23 * 8b6a361b8c482f2 Bernard Metzler 2019-06-20 24 * @srx: Receive Context 8b6a361b8c482f2 Bernard Metzler 2019-06-20 25 * @umem: siw representation of target memory 8b6a361b8c482f2 Bernard Metzler 2019-06-20 26 * @dest_addr: user virtual address 8b6a361b8c482f2 Bernard Metzler 2019-06-20 27 * @len: number of bytes to place 8b6a361b8c482f2 Bernard Metzler 2019-06-20 28 */ 8b6a361b8c482f2 Bernard Metzler 2019-06-20 29 static int siw_rx_umem(struct siw_rx_stream *srx, struct siw_umem *umem, 8b6a361b8c482f2 Bernard Metzler 2019-06-20 30 u64 dest_addr, int len) 8b6a361b8c482f2 Bernard Metzler 2019-06-20 31 { 8b6a361b8c482f2 Bernard Metzler 2019-06-20 32 int copied = 0; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 33 8b6a361b8c482f2 Bernard Metzler 2019-06-20 34 while (len) { 8b6a361b8c482f2 Bernard Metzler 2019-06-20 35 struct page *p; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 36 int pg_off, bytes, rv; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 37 void *dest; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 38 8b6a361b8c482f2 Bernard Metzler 2019-06-20 39 p = siw_get_upage(umem, dest_addr); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 40 if (unlikely(!p)) { 8b6a361b8c482f2 Bernard Metzler 2019-06-20 41 pr_warn("siw: %s: [QP %u]: bogus addr: %p, %p\n", 8b6a361b8c482f2 Bernard Metzler 2019-06-20 42 __func__, qp_id(rx_qp(srx)), 8b6a361b8c482f2 Bernard Metzler 2019-06-20 43 (void *)dest_addr, (void *)umem->fp_addr); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 44 /* siw internal error */ 8b6a361b8c482f2 Bernard Metzler 2019-06-20 45 srx->skb_copied += copied; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 46 srx->skb_new -= copied; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 47 8b6a361b8c482f2 Bernard Metzler 2019-06-20 48 return -EFAULT; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 49 } 8b6a361b8c482f2 Bernard Metzler 2019-06-20 50 pg_off = dest_addr & ~PAGE_MASK; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 51 bytes = min(len, (int)PAGE_SIZE - pg_off); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 52 8b6a361b8c482f2 Bernard Metzler 2019-06-20 53 siw_dbg_qp(rx_qp(srx), "page %p, bytes=%u\n", p, bytes); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 54 8b6a361b8c482f2 Bernard Metzler 2019-06-20 55 dest = kmap_atomic(p); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 56 rv = skb_copy_bits(srx->skb, srx->skb_offset, dest + pg_off, 8b6a361b8c482f2 Bernard Metzler 2019-06-20 57 bytes); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 58 8b6a361b8c482f2 Bernard Metzler 2019-06-20 59 if (unlikely(rv)) { 8b6a361b8c482f2 Bernard Metzler 2019-06-20 60 kunmap_atomic(dest); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 61 srx->skb_copied += copied; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 62 srx->skb_new -= copied; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 63 8b6a361b8c482f2 Bernard Metzler 2019-06-20 64 pr_warn("siw: [QP %u]: %s, len %d, page %p, rv %d\n", 8b6a361b8c482f2 Bernard Metzler 2019-06-20 65 qp_id(rx_qp(srx)), __func__, len, p, rv); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 66 8b6a361b8c482f2 Bernard Metzler 2019-06-20 67 return -EFAULT; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 68 } 8b6a361b8c482f2 Bernard Metzler 2019-06-20 69 if (srx->mpa_crc_hd) { 8b6a361b8c482f2 Bernard Metzler 2019-06-20 70 if (rx_qp(srx)->kernel_verbs) { 8b6a361b8c482f2 Bernard Metzler 2019-06-20 71 crypto_shash_update(srx->mpa_crc_hd, 8b6a361b8c482f2 Bernard Metzler 2019-06-20 72 (u8 *)(dest + pg_off), bytes); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 73 kunmap_atomic(dest); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 74 } else { 8b6a361b8c482f2 Bernard Metzler 2019-06-20 75 kunmap_atomic(dest); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 76 /* 8b6a361b8c482f2 Bernard Metzler 2019-06-20 77 * Do CRC on original, not target buffer. 8b6a361b8c482f2 Bernard Metzler 2019-06-20 78 * Some user land applications may 8b6a361b8c482f2 Bernard Metzler 2019-06-20 79 * concurrently write the target buffer, 8b6a361b8c482f2 Bernard Metzler 2019-06-20 80 * which would yield a broken CRC. 8b6a361b8c482f2 Bernard Metzler 2019-06-20 81 * Walking the skb twice is very ineffcient. 8b6a361b8c482f2 Bernard Metzler 2019-06-20 82 * Folding the CRC into skb_copy_bits() 8b6a361b8c482f2 Bernard Metzler 2019-06-20 83 * would be much better, but is currently 8b6a361b8c482f2 Bernard Metzler 2019-06-20 84 * not supported. 8b6a361b8c482f2 Bernard Metzler 2019-06-20 85 */ 8b6a361b8c482f2 Bernard Metzler 2019-06-20 86 siw_crc_skb(srx, bytes); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 87 } 8b6a361b8c482f2 Bernard Metzler 2019-06-20 88 } else { 8b6a361b8c482f2 Bernard Metzler 2019-06-20 89 kunmap_atomic(dest); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 90 } 8b6a361b8c482f2 Bernard Metzler 2019-06-20 91 srx->skb_offset += bytes; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 92 copied += bytes; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 93 len -= bytes; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 94 dest_addr += bytes; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 95 pg_off = 0; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 96 } 8b6a361b8c482f2 Bernard Metzler 2019-06-20 97 srx->skb_copied += copied; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 98 srx->skb_new -= copied; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 99 8b6a361b8c482f2 Bernard Metzler 2019-06-20 100 return copied; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 101 } 8b6a361b8c482f2 Bernard Metzler 2019-06-20 102 8b6a361b8c482f2 Bernard Metzler 2019-06-20 103 static int siw_rx_kva(struct siw_rx_stream *srx, void *kva, int len) 8b6a361b8c482f2 Bernard Metzler 2019-06-20 104 { 8b6a361b8c482f2 Bernard Metzler 2019-06-20 105 int rv; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 106 8b6a361b8c482f2 Bernard Metzler 2019-06-20 107 siw_dbg_qp(rx_qp(srx), "kva: 0x%p, len: %u\n", kva, len); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 108 8b6a361b8c482f2 Bernard Metzler 2019-06-20 109 rv = skb_copy_bits(srx->skb, srx->skb_offset, kva, len); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 110 if (unlikely(rv)) { 8b6a361b8c482f2 Bernard Metzler 2019-06-20 111 pr_warn("siw: [QP %u]: %s, len %d, kva 0x%p, rv %d\n", 8b6a361b8c482f2 Bernard Metzler 2019-06-20 112 qp_id(rx_qp(srx)), __func__, len, kva, rv); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 113 8b6a361b8c482f2 Bernard Metzler 2019-06-20 114 return rv; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 115 } 8b6a361b8c482f2 Bernard Metzler 2019-06-20 116 if (srx->mpa_crc_hd) 8b6a361b8c482f2 Bernard Metzler 2019-06-20 117 crypto_shash_update(srx->mpa_crc_hd, (u8 *)kva, len); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 118 8b6a361b8c482f2 Bernard Metzler 2019-06-20 119 srx->skb_offset += len; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 120 srx->skb_copied += len; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 121 srx->skb_new -= len; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 122 8b6a361b8c482f2 Bernard Metzler 2019-06-20 123 return len; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 124 } 8b6a361b8c482f2 Bernard Metzler 2019-06-20 125 8b6a361b8c482f2 Bernard Metzler 2019-06-20 126 static int siw_rx_pbl(struct siw_rx_stream *srx, int *pbl_idx, 8b6a361b8c482f2 Bernard Metzler 2019-06-20 127 struct siw_mem *mem, u64 addr, int len) 8b6a361b8c482f2 Bernard Metzler 2019-06-20 128 { 8b6a361b8c482f2 Bernard Metzler 2019-06-20 129 struct siw_pbl *pbl = mem->pbl; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 130 u64 offset = addr - mem->va; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 131 int copied = 0; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 132 8b6a361b8c482f2 Bernard Metzler 2019-06-20 133 while (len) { 8b6a361b8c482f2 Bernard Metzler 2019-06-20 134 int bytes; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 135 u64 buf_addr = 8b6a361b8c482f2 Bernard Metzler 2019-06-20 136 siw_pbl_get_buffer(pbl, offset, &bytes, pbl_idx); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 137 if (!buf_addr) 8b6a361b8c482f2 Bernard Metzler 2019-06-20 138 break; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 139 8b6a361b8c482f2 Bernard Metzler 2019-06-20 140 bytes = min(bytes, len); 8b6a361b8c482f2 Bernard Metzler 2019-06-20 @141 if (siw_rx_kva(srx, (void *)buf_addr, bytes) == bytes) { 8b6a361b8c482f2 Bernard Metzler 2019-06-20 142 copied += bytes; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 143 offset += bytes; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 144 len -= bytes; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 145 } else { 8b6a361b8c482f2 Bernard Metzler 2019-06-20 146 break; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 147 } 8b6a361b8c482f2 Bernard Metzler 2019-06-20 148 } 8b6a361b8c482f2 Bernard Metzler 2019-06-20 149 return copied; 8b6a361b8c482f2 Bernard Metzler 2019-06-20 150 } 8b6a361b8c482f2 Bernard Metzler 2019-06-20 151 :::::: The code at line 141 was first introduced by commit :::::: 8b6a361b8c482f22ac99c3273285ff16b23fba91 rdma/siw: receive path :::::: TO: Bernard Metzler <bmt(a)zurich.ibm.com&gt; :::::: CC: Jason Gunthorpe <jgg(a)mellanox.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org