1:46 p.m.
Hi Alice,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue.git dev-queue
head: 0499ed813d995f0a1b97e5e59ff7fd864d8ffb62
commit: ac1fe751555b417952104c2a5f09592c0348c40d [91/92] iecm: Add iecm to the kernel
build system
config: alpha-allyesconfig (attached as .config)
compiler: alpha-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout ac1fe751555b417952104c2a5f09592c0348c40d
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All errors (new ones prefixed by >>):
drivers/net/ethernet/intel/iecm/iecm_txrx.c: In function
'iecm_rx_can_reuse_page':
> drivers/net/ethernet/intel/iecm/iecm_txrx.c:2462:28: error:
'last_offset' undeclared (first use in this function); did you mean
'page_offset'?
2462 | if (rx_buf->page_offset > last_offset)
| ^~~~~~~~~~~
| page_offset
drivers/net/ethernet/intel/iecm/iecm_txrx.c:2462:28: note: each undeclared identifier
is reported only once for each function it appears in
vim +2462 drivers/net/ethernet/intel/iecm/iecm_txrx.c
2158dc66f3a92d Alice Michael 2020-07-14 2436
2158dc66f3a92d Alice Michael 2020-07-14 2437 /**
2158dc66f3a92d Alice Michael 2020-07-14 2438 * iecm_rx_can_reuse_page - Determine if
page can be reused for another Rx
2158dc66f3a92d Alice Michael 2020-07-14 2439 * @rx_buf: buffer containing the page
2158dc66f3a92d Alice Michael 2020-07-14 2440 *
2158dc66f3a92d Alice Michael 2020-07-14 2441 * If page is reusable, we have a green
light for calling iecm_reuse_rx_page,
2158dc66f3a92d Alice Michael 2020-07-14 2442 * which will assign the current buffer to
the buffer that next_to_alloc is
2158dc66f3a92d Alice Michael 2020-07-14 2443 * pointing to; otherwise, the DMA mapping
needs to be destroyed and
2158dc66f3a92d Alice Michael 2020-07-14 2444 * page freed
2158dc66f3a92d Alice Michael 2020-07-14 2445 */
2158dc66f3a92d Alice Michael 2020-07-14 2446 static bool iecm_rx_can_reuse_page(struct
iecm_rx_buf *rx_buf)
2158dc66f3a92d Alice Michael 2020-07-14 2447 {
8aa91340983bdc Alice Michael 2020-07-14 2448 #if (PAGE_SIZE >= 8192)
8aa91340983bdc Alice Michael 2020-07-14 2449 #endif
8aa91340983bdc Alice Michael 2020-07-14 2450 unsigned int pagecnt_bias =
rx_buf->pagecnt_bias;
8aa91340983bdc Alice Michael 2020-07-14 2451 struct page *page = rx_buf->page;
8aa91340983bdc Alice Michael 2020-07-14 2452
8aa91340983bdc Alice Michael 2020-07-14 2453 /* avoid re-using remote pages */
8aa91340983bdc Alice Michael 2020-07-14 2454 if
(unlikely(iecm_rx_page_is_reserved(page)))
8aa91340983bdc Alice Michael 2020-07-14 2455 return false;
8aa91340983bdc Alice Michael 2020-07-14 2456
8aa91340983bdc Alice Michael 2020-07-14 2457 #if (PAGE_SIZE < 8192)
8aa91340983bdc Alice Michael 2020-07-14 2458 /* if we are only owner of page we can
reuse it */
8aa91340983bdc Alice Michael 2020-07-14 2459 if (unlikely((page_count(page) -
pagecnt_bias) > 1))
8aa91340983bdc Alice Michael 2020-07-14 2460 return false;
8aa91340983bdc Alice Michael 2020-07-14 2461 #else
8aa91340983bdc Alice Michael 2020-07-14 @2462 if (rx_buf->page_offset >
last_offset)
8aa91340983bdc Alice Michael 2020-07-14 2463 return false;
8aa91340983bdc Alice Michael 2020-07-14 2464 #endif /* PAGE_SIZE < 8192) */
8aa91340983bdc Alice Michael 2020-07-14 2465
8aa91340983bdc Alice Michael 2020-07-14 2466 /* If we have drained the page fragment
pool we need to update
8aa91340983bdc Alice Michael 2020-07-14 2467 * the pagecnt_bias and page count so that
we fully restock the
8aa91340983bdc Alice Michael 2020-07-14 2468 * number of references the driver holds.
8aa91340983bdc Alice Michael 2020-07-14 2469 */
8aa91340983bdc Alice Michael 2020-07-14 2470 if (unlikely(pagecnt_bias == 1)) {
8aa91340983bdc Alice Michael 2020-07-14 2471 page_ref_add(page, USHRT_MAX - 1);
8aa91340983bdc Alice Michael 2020-07-14 2472 rx_buf->pagecnt_bias = USHRT_MAX;
8aa91340983bdc Alice Michael 2020-07-14 2473 }
8aa91340983bdc Alice Michael 2020-07-14 2474
8aa91340983bdc Alice Michael 2020-07-14 2475 return true;
2158dc66f3a92d Alice Michael 2020-07-14 2476 }
2158dc66f3a92d Alice Michael 2020-07-14 2477
:::::: The code at line 2462 was first introduced by commit
:::::: 8aa91340983bdcd6861be0aad259c5b1d14584fb iecm: Add splitq TX/RX
:::::: TO: Alice Michael <alice.michael(a)intel.com>
:::::: CC: Tony Nguyen <anthony.l.nguyen(a)intel.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org