Re: [PATCH] xen/balloon: rename alloc/free_xenballooned_pages
From: kernel test robot
Date: Sat Oct 30 2021 - 06:31:54 EST
Hi Juergen,
I love your patch! Yet something to improve:
[auto build test ERROR on xen-tip/linux-next]
[also build test ERROR on linux/master linus/master v5.15-rc7 next-20211029]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Juergen-Gross/xen-balloon-rename-alloc-free_xenballooned_pages/20211029-222901
base: https://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git linux-next
config: arm64-defconfig (attached as .config)
compiler: aarch64-linux-gcc (GCC) 11.2.0
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
# https://github.com/0day-ci/linux/commit/4db6d782d7d5ef16ced6f4e54161bd8f1148d39b
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Juergen-Gross/xen-balloon-rename-alloc-free_xenballooned_pages/20211029-222901
git checkout 4db6d782d7d5ef16ced6f4e54161bd8f1148d39b
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arm64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All errors (new ones prefixed by >>):
>> drivers/xen/balloon.c:612:5: error: conflicting types for 'xen_alloc_unpopulated_pages'; have 'int(int, struct page **)'
612 | int xen_alloc_unpopulated_pages(int nr_pages, struct page **pages)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/xen/balloon.c:68:
include/xen/xen.h:55:5: note: previous declaration of 'xen_alloc_unpopulated_pages' with type 'int(unsigned int, struct page **)'
55 | int xen_alloc_unpopulated_pages(unsigned int nr_pages, struct page **pages);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/linkage.h:7,
from include/linux/kernel.h:8,
from include/linux/list.h:9,
from include/linux/rculist.h:10,
from include/linux/pid.h:5,
from include/linux/sched.h:14,
from include/linux/ratelimit.h:6,
from include/linux/dev_printk.h:16,
from include/linux/device.h:15,
from include/linux/node.h:18,
from include/linux/cpu.h:17,
from drivers/xen/balloon.c:41:
drivers/xen/balloon.c:658:15: error: conflicting types for 'xen_alloc_unpopulated_pages'; have 'int(int, struct page **)'
658 | EXPORT_SYMBOL(xen_alloc_unpopulated_pages);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/export.h:98:28: note: in definition of macro '___EXPORT_SYMBOL'
98 | extern typeof(sym) sym; \
| ^~~
include/linux/export.h:160:41: note: in expansion of macro '__EXPORT_SYMBOL'
160 | #define _EXPORT_SYMBOL(sym, sec) __EXPORT_SYMBOL(sym, sec, "")
| ^~~~~~~~~~~~~~~
include/linux/export.h:163:41: note: in expansion of macro '_EXPORT_SYMBOL'
163 | #define EXPORT_SYMBOL(sym) _EXPORT_SYMBOL(sym, "")
| ^~~~~~~~~~~~~~
drivers/xen/balloon.c:658:1: note: in expansion of macro 'EXPORT_SYMBOL'
658 | EXPORT_SYMBOL(xen_alloc_unpopulated_pages);
| ^~~~~~~~~~~~~
In file included from drivers/xen/balloon.c:68:
include/xen/xen.h:55:5: note: previous declaration of 'xen_alloc_unpopulated_pages' with type 'int(unsigned int, struct page **)'
55 | int xen_alloc_unpopulated_pages(unsigned int nr_pages, struct page **pages);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/xen/balloon.c:665:6: error: conflicting types for 'xen_free_unpopulated_pages'; have 'void(int, struct page **)'
665 | void xen_free_unpopulated_pages(int nr_pages, struct page **pages)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/xen/balloon.c:68:
include/xen/xen.h:56:6: note: previous declaration of 'xen_free_unpopulated_pages' with type 'void(unsigned int, struct page **)'
56 | void xen_free_unpopulated_pages(unsigned int nr_pages, struct page **pages);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/linkage.h:7,
from include/linux/kernel.h:8,
from include/linux/list.h:9,
from include/linux/rculist.h:10,
from include/linux/pid.h:5,
from include/linux/sched.h:14,
from include/linux/ratelimit.h:6,
from include/linux/dev_printk.h:16,
from include/linux/device.h:15,
from include/linux/node.h:18,
from include/linux/cpu.h:17,
from drivers/xen/balloon.c:41:
drivers/xen/balloon.c:684:15: error: conflicting types for 'xen_free_unpopulated_pages'; have 'void(int, struct page **)'
684 | EXPORT_SYMBOL(xen_free_unpopulated_pages);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/export.h:98:28: note: in definition of macro '___EXPORT_SYMBOL'
98 | extern typeof(sym) sym; \
| ^~~
include/linux/export.h:160:41: note: in expansion of macro '__EXPORT_SYMBOL'
160 | #define _EXPORT_SYMBOL(sym, sec) __EXPORT_SYMBOL(sym, sec, "")
| ^~~~~~~~~~~~~~~
include/linux/export.h:163:41: note: in expansion of macro '_EXPORT_SYMBOL'
163 | #define EXPORT_SYMBOL(sym) _EXPORT_SYMBOL(sym, "")
| ^~~~~~~~~~~~~~
drivers/xen/balloon.c:684:1: note: in expansion of macro 'EXPORT_SYMBOL'
684 | EXPORT_SYMBOL(xen_free_unpopulated_pages);
| ^~~~~~~~~~~~~
In file included from drivers/xen/balloon.c:68:
include/xen/xen.h:56:6: note: previous declaration of 'xen_free_unpopulated_pages' with type 'void(unsigned int, struct page **)'
56 | void xen_free_unpopulated_pages(unsigned int nr_pages, struct page **pages);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
vim +612 drivers/xen/balloon.c
605
606 /**
607 * xen_alloc_unpopulated_pages - get pages that have been ballooned out
608 * @nr_pages: Number of pages to get
609 * @pages: pages returned
610 * @return 0 on success, error otherwise
611 */
> 612 int xen_alloc_unpopulated_pages(int nr_pages, struct page **pages)
613 {
614 int pgno = 0;
615 struct page *page;
616 int ret;
617
618 mutex_lock(&balloon_mutex);
619
620 balloon_stats.target_unpopulated += nr_pages;
621
622 while (pgno < nr_pages) {
623 page = balloon_retrieve(true);
624 if (page) {
625 pages[pgno++] = page;
626 #ifdef CONFIG_XEN_HAVE_PVMMU
627 /*
628 * We don't support PV MMU when Linux and Xen is using
629 * different page granularity.
630 */
631 BUILD_BUG_ON(XEN_PAGE_SIZE != PAGE_SIZE);
632
633 if (!xen_feature(XENFEAT_auto_translated_physmap)) {
634 ret = xen_alloc_p2m_entry(page_to_pfn(page));
635 if (ret < 0)
636 goto out_undo;
637 }
638 #endif
639 } else {
640 ret = add_ballooned_pages(nr_pages - pgno);
641 if (ret < 0)
642 goto out_undo;
643 }
644 }
645 mutex_unlock(&balloon_mutex);
646 return 0;
647 out_undo:
648 mutex_unlock(&balloon_mutex);
649 xen_free_unpopulated_pages(pgno, pages);
650 /*
651 * NB: free_xenballooned_pages will only subtract pgno pages, but since
652 * target_unpopulated is incremented with nr_pages at the start we need
653 * to remove the remaining ones also, or accounting will be screwed.
654 */
655 balloon_stats.target_unpopulated -= nr_pages - pgno;
656 return ret;
657 }
658 EXPORT_SYMBOL(xen_alloc_unpopulated_pages);
659
660 /**
661 * xen_free_unpopulated_pages - return pages retrieved with get_ballooned_pages
662 * @nr_pages: Number of pages
663 * @pages: pages to return
664 */
> 665 void xen_free_unpopulated_pages(int nr_pages, struct page **pages)
666 {
667 int i;
668
669 mutex_lock(&balloon_mutex);
670
671 for (i = 0; i < nr_pages; i++) {
672 if (pages[i])
673 balloon_append(pages[i]);
674 }
675
676 balloon_stats.target_unpopulated -= nr_pages;
677
678 /* The balloon may be too large now. Shrink it if needed. */
679 if (current_credit())
680 wake_up(&balloon_thread_wq);
681
682 mutex_unlock(&balloon_mutex);
683 }
684 EXPORT_SYMBOL(xen_free_unpopulated_pages);
685
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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