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Message-ID: <202001201425.ttqGO8xJ%lkp@intel.com>
Date: Mon, 20 Jan 2020 14:15:07 +0800
From: kbuild test robot <lkp@...el.com>
To: yu kuai <yukuai3@...wei.com>
Cc: kbuild-all@...ts.01.org, b.zolnierkie@...sung.com,
dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
linux-kernel@...r.kernel.org, yukuai3@...wei.com,
zhengbin13@...wei.com, yi.zhang@...wei.com
Subject: Re: [PATCH] video: remove set but not used variable 'mach64RefFreq'
Hi yu,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on tegra-drm/drm/tegra/for-next]
[also build test ERROR on linux/master linus/master v5.5-rc7 next-20200117]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]
url: https://github.com/0day-ci/linux/commits/yu-kuai/video-remove-set-but-not-used-variable-mach64RefFreq/20200119-203016
base: git://anongit.freedesktop.org/tegra/linux.git drm/tegra/for-next
config: x86_64-randconfig-s1-20200120 (attached as .config)
compiler: gcc-6 (Debian 6.3.0-18+deb9u1) 6.3.0 20170516
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64
If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@...el.com>
All errors (new ones prefixed by >>):
drivers/video/fbdev/aty/mach64_gx.c: In function 'aty_var_to_pll_8398':
drivers/video/fbdev/aty/mach64_gx.c:625:2: error: 'mach64MinFreq' undeclared (first use in this function)
mach64MinFreq = MIN_FREQ_2595;
^~~~~~~~~~~~~
drivers/video/fbdev/aty/mach64_gx.c:625:2: note: each undeclared identifier is reported only once for each function it appears in
>> drivers/video/fbdev/aty/mach64_gx.c:626:2: error: 'mach64MaxFreq' undeclared (first use in this function)
mach64MaxFreq = MAX_FREQ_2595;
^~~~~~~~~~~~~
vim +/mach64MaxFreq +626 drivers/video/fbdev/aty/mach64_gx.c
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 607
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 608
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 609 /*
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 610 * Chrontel 8398 Clock Chip
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 611 */
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 612
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 613 static int aty_var_to_pll_8398(const struct fb_info *info, u32 vclk_per,
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 614 u32 bpp, union aty_pll *pll)
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 615 {
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 616 u32 tempA, tempB, fOut, longMHz100, diff, preDiff;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 617
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 618 u32 mhz100; /* in 0.01 MHz */
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 619 u32 program_bits;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 620 /* u32 post_divider; */
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 621 u16 m, n, k = 0, save_m, save_n, twoToKth;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 622
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 623 /* Calculate the programming word */
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 624 mhz100 = 100000000 / vclk_per;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 625 mach64MinFreq = MIN_FREQ_2595;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 @626 mach64MaxFreq = MAX_FREQ_2595;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 627
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 628 save_m = 0;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 629 save_n = 0;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 630
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 631 /* Calculate program word */
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 632 if (mhz100 == 0)
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 633 program_bits = 0xE0;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 634 else {
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 635 if (mhz100 < mach64MinFreq)
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 636 mhz100 = mach64MinFreq;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 637 if (mhz100 > mach64MaxFreq)
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 638 mhz100 = mach64MaxFreq;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 639
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 640 longMHz100 = mhz100 * 256 / 100; /* 8 bit scale this */
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 641
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 642 while (mhz100 < (mach64MinFreq << 3)) {
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 643 mhz100 <<= 1;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 644 k++;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 645 }
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 646
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 647 twoToKth = 1 << k;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 648 diff = 0;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 649 preDiff = 0xFFFFFFFF;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 650
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 651 for (m = MIN_M; m <= MAX_M; m++) {
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 652 for (n = MIN_N; n <= MAX_N; n++) {
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 653 tempA = 938356; /* 14.31818 * 65536 */
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 654 tempA *= (n + 8); /* 43..256 */
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 655 tempB = twoToKth * 256;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 656 tempB *= (m + 2); /* 4..32 */
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 657 fOut = tempA / tempB; /* 8 bit scale */
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 658
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 659 if (longMHz100 > fOut)
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 660 diff = longMHz100 - fOut;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 661 else
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 662 diff = fOut - longMHz100;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 663
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 664 if (diff < preDiff) {
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 665 save_m = m;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 666 save_n = n;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 667 preDiff = diff;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 668 }
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 669 }
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 670 }
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 671
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 672 program_bits = (k << 6) + (save_m) + (save_n << 8);
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 673 }
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 674
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 675 pll->ics2595.program_bits = program_bits;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 676 pll->ics2595.locationAddr = 0;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 677 pll->ics2595.post_divider = 0;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 678 pll->ics2595.period_in_ps = vclk_per;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 679
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 680 return 0;
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 681 }
^1da177e4c3f41 drivers/video/aty/mach64_gx.c Linus Torvalds 2005-04-16 682
:::::: The code at line 626 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2
:::::: TO: Linus Torvalds <torvalds@...970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@...970.osdl.org>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation
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