tree: https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git work.splice_read head: 9a791e155521e4599ebe1d2fc2ed17fc705d5348 commit: 34ec04831f679ac550a7e695e37cb4ceec6125be [10/11] new iov_iter flavour: pipe-backed config: m68k-sun3_defconfig (attached as .config) compiler: m68k-linux-gcc (GCC) 4.9.0 reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 34ec04831f679ac550a7e695e37cb4ceec6125be # save the attached .config to linux build tree make.cross ARCH=m68k All warnings (new ones prefixed by >>): In file included from include/linux/uio.h:12:0, from lib/iov_iter.c:2: lib/iov_iter.c: In function 'copy_pipe_to_iter': include/linux/kernel.h:742:17: warning: comparison of distinct pointer types lacks a cast (void) (&_min1 == &_min2); \ ^ >> lib/iov_iter.c:532:18: note: in expansion of macro 'min' size_t chunk = min(n, PAGE_SIZE - off); ^ lib/iov_iter.c: In function 'pipe_zero': include/linux/kernel.h:742:17: warning: comparison of distinct pointer types lacks a cast (void) (&_min1 == &_min2); \ ^ lib/iov_iter.c:644:18: note: in expansion of macro 'min' size_t chunk = min(n, PAGE_SIZE - off); ^ lib/iov_iter.c: In function 'pipe_get_pages': include/linux/kernel.h:742:17: warning: comparison of distinct pointer types lacks a cast (void) (&_min1 == &_min2); \ ^ lib/iov_iter.c:880:3: note: in expansion of macro 'min' min(maxsize, min(npages,maxpages) * PAGE_SIZE - *start), ^ vim +/min +532 lib/iov_iter.c 516 } 517 518 static size_t copy_pipe_to_iter(const void *addr, size_t bytes, 519 struct iov_iter *i) 520 { 521 struct pipe_inode_info *pipe = i->pipe; 522 size_t n, off; 523 int idx; 524 525 if (!sanity(i)) 526 return 0; 527 528 bytes = n = push_pipe(i, bytes, &idx, &off); 529 if (unlikely(!n)) 530 return 0; 531 for ( ; n; idx = next_idx(idx, pipe), off = 0) { > 532 size_t chunk = min(n, PAGE_SIZE - off); 533 memcpy_to_page(pipe->bufs[idx].page, off, addr, chunk); 534 i->nr_segs = idx; 535 i->iov_offset = off + chunk; 536 n -= chunk; 537 addr += chunk; 538 } 539 i->count -= bytes; 540 return bytes; --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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