Re: [PATCH v2] entry/kvm: Make vCPU tasks exit to userspace when a livepatch is pending

[kernel test robot <lkp@intel.com>]

Hi Seth,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on v5.18-rc5]
[also build test ERROR on next-20220503]
[cannot apply to tip/core/entry]
[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/intel-lab-lkp/linux/commits/Seth-Forshee/entry-kvm-Make-vCPU-tasks-exit-to-userspace-when-a-livepatch-is-pending/20220504-015159
base:    672c0c5173427e6b3e2a9bbb7be51ceeec78093a
config: arm64-randconfig-r034-20220502 (https://download.01.org/0day-ci/archive/20220504/202205040945.JZNNub2D-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 11.3.0
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
        # https://github.com/intel-lab-lkp/linux/commit/1c97c02f02b9f8e6b8e1f11657f950510f9c828e
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Seth-Forshee/entry-kvm-Make-vCPU-tasks-exit-to-userspace-when-a-livepatch-is-pending/20220504-015159
        git checkout 1c97c02f02b9f8e6b8e1f11657f950510f9c828e
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   In file included from arch/arm64/kvm/arm.c:9:
   include/linux/entry-kvm.h: In function '__xfer_to_guest_mode_work_pending':
>> include/linux/entry-kvm.h:20:48: error: '_TIF_PATCH_PENDING' undeclared (first use in this function)
      20 |         (_TIF_NEED_RESCHED | _TIF_SIGPENDING | _TIF_PATCH_PENDING |     \
         |                                                ^~~~~~~~~~~~~~~~~~
   include/linux/entry-kvm.h:80:29: note: in expansion of macro 'XFER_TO_GUEST_MODE_WORK'
      80 |         return !!(ti_work & XFER_TO_GUEST_MODE_WORK);
         |                             ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/entry-kvm.h:20:48: note: each undeclared identifier is reported only once for each function it appears in
      20 |         (_TIF_NEED_RESCHED | _TIF_SIGPENDING | _TIF_PATCH_PENDING |     \
         |                                                ^~~~~~~~~~~~~~~~~~
   include/linux/entry-kvm.h:80:29: note: in expansion of macro 'XFER_TO_GUEST_MODE_WORK'
      80 |         return !!(ti_work & XFER_TO_GUEST_MODE_WORK);
         |                             ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/entry-kvm.h:81:1: error: control reaches end of non-void function [-Werror=return-type]
      81 | }
         | ^
   cc1: some warnings being treated as errors
--
   In file included from kernel/entry/kvm.c:3:
   include/linux/entry-kvm.h: In function '__xfer_to_guest_mode_work_pending':
>> include/linux/entry-kvm.h:20:48: error: '_TIF_PATCH_PENDING' undeclared (first use in this function)
      20 |         (_TIF_NEED_RESCHED | _TIF_SIGPENDING | _TIF_PATCH_PENDING |     \
         |                                                ^~~~~~~~~~~~~~~~~~
   include/linux/entry-kvm.h:80:29: note: in expansion of macro 'XFER_TO_GUEST_MODE_WORK'
      80 |         return !!(ti_work & XFER_TO_GUEST_MODE_WORK);
         |                             ^~~~~~~~~~~~~~~~~~~~~~~
   include/linux/entry-kvm.h:20:48: note: each undeclared identifier is reported only once for each function it appears in
      20 |         (_TIF_NEED_RESCHED | _TIF_SIGPENDING | _TIF_PATCH_PENDING |     \
         |                                                ^~~~~~~~~~~~~~~~~~
   include/linux/entry-kvm.h:80:29: note: in expansion of macro 'XFER_TO_GUEST_MODE_WORK'
      80 |         return !!(ti_work & XFER_TO_GUEST_MODE_WORK);
         |                             ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/entry/kvm.c: In function 'xfer_to_guest_mode_work':
>> kernel/entry/kvm.c:22:50: error: '_TIF_PATCH_PENDING' undeclared (first use in this function)
      22 |                 if (ti_work & (_TIF_SIGPENDING | _TIF_PATCH_PENDING)) {
         |                                                  ^~~~~~~~~~~~~~~~~~
   In file included from kernel/entry/kvm.c:3:
   kernel/entry/kvm.c: In function 'xfer_to_guest_mode_handle_work':
>> include/linux/entry-kvm.h:20:48: error: '_TIF_PATCH_PENDING' undeclared (first use in this function)
      20 |         (_TIF_NEED_RESCHED | _TIF_SIGPENDING | _TIF_PATCH_PENDING |     \
         |                                                ^~~~~~~~~~~~~~~~~~
   kernel/entry/kvm.c:55:25: note: in expansion of macro 'XFER_TO_GUEST_MODE_WORK'
      55 |         if (!(ti_work & XFER_TO_GUEST_MODE_WORK))
         |                         ^~~~~~~~~~~~~~~~~~~~~~~


vim +/_TIF_PATCH_PENDING +20 include/linux/entry-kvm.h

    18	
    19	#define XFER_TO_GUEST_MODE_WORK						\
  > 20		(_TIF_NEED_RESCHED | _TIF_SIGPENDING | _TIF_PATCH_PENDING |	\
    21		 _TIF_NOTIFY_SIGNAL | _TIF_NOTIFY_RESUME | ARCH_XFER_TO_GUEST_MODE_WORK)
    22	

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