* [dynticks:preempt/dynamic-v4 8/8] arch/x86/include/asm/entry-common.h:20:25: error: implicit declaration of function 'native_save_fl'
@ 2021-01-20 20:50 kernel test robot
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From: kernel test robot @ 2021-01-20 20:50 UTC (permalink / raw)
To: kbuild-all
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git preempt/dynamic-v4
head: b5f3b1da9df4197d0b0ffe0f55f0f6a8c838d75f
commit: b5f3b1da9df4197d0b0ffe0f55f0f6a8c838d75f [8/8] preempt/dynamic: Support dynamic preempt with preempt= boot option
config: um-i386_defconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
# https://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git/commit/?id=b5f3b1da9df4197d0b0ffe0f55f0f6a8c838d75f
git remote add dynticks https://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
git fetch --no-tags dynticks preempt/dynamic-v4
git checkout b5f3b1da9df4197d0b0ffe0f55f0f6a8c838d75f
# save the attached .config to linux build tree
make W=1 ARCH=um SUBARCH=i386
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 >>):
cc1: warning: arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs]
In file included from arch/x86/include/asm/entry-common.h:7,
from include/linux/entry-common.h:11,
from kernel/sched/core.c:15:
arch/x86/include/asm/nospec-branch.h: In function 'mds_clear_cpu_buffers':
>> arch/x86/include/asm/nospec-branch.h:267:24: error: '__KERNEL_DS' undeclared (first use in this function); did you mean 'KERNEL_DS'?
267 | static const u16 ds = __KERNEL_DS;
| ^~~~~~~~~~~
| KERNEL_DS
arch/x86/include/asm/nospec-branch.h:267:24: note: each undeclared identifier is reported only once for each function it appears in
In file included from arch/x86/include/asm/entry-common.h:8,
from include/linux/entry-common.h:11,
from kernel/sched/core.c:15:
arch/x86/include/asm/io_bitmap.h: At top level:
>> arch/x86/include/asm/io_bitmap.h:13:23: error: 'IO_BITMAP_LONGS' undeclared here (not in a function); did you mean 'IDA_BITMAP_LONGS'?
13 | unsigned long bitmap[IO_BITMAP_LONGS];
| ^~~~~~~~~~~~~~~
| IDA_BITMAP_LONGS
In file included from include/linux/entry-common.h:11,
from kernel/sched/core.c:15:
arch/x86/include/asm/entry-common.h: In function 'arch_check_user_regs':
>> arch/x86/include/asm/entry-common.h:20:25: error: implicit declaration of function 'native_save_fl' [-Werror=implicit-function-declaration]
20 | unsigned long flags = native_save_fl();
| ^~~~~~~~~~~~~~
>> arch/x86/include/asm/entry-common.h:26:7: error: implicit declaration of function 'boot_cpu_has'; did you mean 'boot_cpu_init'? [-Werror=implicit-function-declaration]
26 | if (boot_cpu_has(X86_FEATURE_SMAP) ||
| ^~~~~~~~~~~~
| boot_cpu_init
In file included from ./arch/um/include/generated/asm/bug.h:1,
from include/linux/bug.h:5,
from include/linux/thread_info.h:12,
from include/asm-generic/current.h:5,
from ./arch/um/include/generated/asm/current.h:1,
from include/linux/sched.h:12,
from include/linux/kthread.h:6,
from include/trace/events/sched.h:8,
from kernel/sched/core.c:10:
>> arch/x86/include/asm/entry-common.h:40:17: error: implicit declaration of function 'on_thread_stack'; did you mean 'setup_thread_stack'? [-Werror=implicit-function-declaration]
40 | WARN_ON_ONCE(!on_thread_stack());
| ^~~~~~~~~~~~~~~
include/asm-generic/bug.h:145:27: note: in definition of macro 'WARN_ON_ONCE'
145 | int __ret_warn_once = !!(condition); \
| ^~~~~~~~~
In file included from include/linux/entry-common.h:11,
from kernel/sched/core.c:15:
arch/x86/include/asm/entry-common.h: In function 'arch_exit_to_user_mode_prepare':
>> arch/x86/include/asm/entry-common.h:51:16: error: '_TIF_USER_RETURN_NOTIFY' undeclared (first use in this function)
51 | if (ti_work & _TIF_USER_RETURN_NOTIFY)
| ^~~~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/err.h:5,
from include/linux/kthread.h:5,
from include/trace/events/sched.h:8,
from kernel/sched/core.c:10:
>> arch/x86/include/asm/entry-common.h:54:25: error: '_TIF_IO_BITMAP' undeclared (first use in this function)
54 | if (unlikely(ti_work & _TIF_IO_BITMAP))
| ^~~~~~~~~~~~~~
include/linux/compiler.h:78:42: note: in definition of macro 'unlikely'
78 | # define unlikely(x) __builtin_expect(!!(x), 0)
| ^
>> arch/x86/include/asm/entry-common.h:58:25: error: '_TIF_NEED_FPU_LOAD' undeclared (first use in this function)
58 | if (unlikely(ti_work & _TIF_NEED_FPU_LOAD))
| ^~~~~~~~~~~~~~~~~~
include/linux/compiler.h:78:42: note: in definition of macro 'unlikely'
78 | # define unlikely(x) __builtin_expect(!!(x), 0)
| ^
kernel/sched/core.c: In function 'ttwu_stat':
kernel/sched/core.c:2895:13: warning: variable 'rq' set but not used [-Wunused-but-set-variable]
2895 | struct rq *rq;
| ^~
kernel/sched/core.c: In function 'schedule_tail':
kernel/sched/core.c:4239:13: warning: variable 'rq' set but not used [-Wunused-but-set-variable]
4239 | struct rq *rq;
| ^~
cc1: some warnings being treated as errors
vim +/native_save_fl +20 arch/x86/include/asm/entry-common.h
167fd210ec0555d3 Thomas Gleixner 2020-07-23 10
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 11 /* Check that the stack and regs on entry from user mode are sane. */
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 12 static __always_inline void arch_check_user_regs(struct pt_regs *regs)
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 13 {
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 14 if (IS_ENABLED(CONFIG_DEBUG_ENTRY)) {
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 15 /*
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 16 * Make sure that the entry code gave us a sensible EFLAGS
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 17 * register. Native because we want to check the actual CPU
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 18 * state, not the interrupt state as imagined by Xen.
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 19 */
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 @20 unsigned long flags = native_save_fl();
662a0221893a3d58 Peter Zijlstra 2020-09-02 21 unsigned long mask = X86_EFLAGS_DF | X86_EFLAGS_NT;
662a0221893a3d58 Peter Zijlstra 2020-09-02 22
662a0221893a3d58 Peter Zijlstra 2020-09-02 23 /*
662a0221893a3d58 Peter Zijlstra 2020-09-02 24 * For !SMAP hardware we patch out CLAC on entry.
662a0221893a3d58 Peter Zijlstra 2020-09-02 25 */
662a0221893a3d58 Peter Zijlstra 2020-09-02 @26 if (boot_cpu_has(X86_FEATURE_SMAP) ||
662a0221893a3d58 Peter Zijlstra 2020-09-02 27 (IS_ENABLED(CONFIG_64_BIT) && boot_cpu_has(X86_FEATURE_XENPV)))
662a0221893a3d58 Peter Zijlstra 2020-09-02 28 mask |= X86_EFLAGS_AC;
662a0221893a3d58 Peter Zijlstra 2020-09-02 29
662a0221893a3d58 Peter Zijlstra 2020-09-02 30 WARN_ON_ONCE(flags & mask);
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 31
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 32 /* We think we came from user mode. Make sure pt_regs agrees. */
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 33 WARN_ON_ONCE(!user_mode(regs));
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 34
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 35 /*
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 36 * All entries from user mode (except #DF) should be on the
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 37 * normal thread stack and should have user pt_regs in the
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 38 * correct location.
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 39 */
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 @40 WARN_ON_ONCE(!on_thread_stack());
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 41 WARN_ON_ONCE(regs != task_pt_regs(current));
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 42 }
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 43 }
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 44 #define arch_check_user_regs arch_check_user_regs
27d6b4d14f5c3ab2 Thomas Gleixner 2020-07-23 45
167fd210ec0555d3 Thomas Gleixner 2020-07-23 46 #define ARCH_SYSCALL_EXIT_WORK (_TIF_SINGLESTEP)
167fd210ec0555d3 Thomas Gleixner 2020-07-23 47
167fd210ec0555d3 Thomas Gleixner 2020-07-23 48 static inline void arch_exit_to_user_mode_prepare(struct pt_regs *regs,
167fd210ec0555d3 Thomas Gleixner 2020-07-23 49 unsigned long ti_work)
167fd210ec0555d3 Thomas Gleixner 2020-07-23 50 {
167fd210ec0555d3 Thomas Gleixner 2020-07-23 @51 if (ti_work & _TIF_USER_RETURN_NOTIFY)
167fd210ec0555d3 Thomas Gleixner 2020-07-23 52 fire_user_return_notifiers();
167fd210ec0555d3 Thomas Gleixner 2020-07-23 53
167fd210ec0555d3 Thomas Gleixner 2020-07-23 @54 if (unlikely(ti_work & _TIF_IO_BITMAP))
167fd210ec0555d3 Thomas Gleixner 2020-07-23 55 tss_update_io_bitmap();
167fd210ec0555d3 Thomas Gleixner 2020-07-23 56
167fd210ec0555d3 Thomas Gleixner 2020-07-23 57 fpregs_assert_state_consistent();
167fd210ec0555d3 Thomas Gleixner 2020-07-23 @58 if (unlikely(ti_work & _TIF_NEED_FPU_LOAD))
167fd210ec0555d3 Thomas Gleixner 2020-07-23 59 switch_fpu_return();
167fd210ec0555d3 Thomas Gleixner 2020-07-23 60
:::::: The code at line 20 was first introduced by commit
:::::: 27d6b4d14f5c3ab21c4aef87dd04055a2d7adf14 x86/entry: Use generic syscall entry function
:::::: TO: Thomas Gleixner <tglx@linutronix.de>
:::::: CC: Thomas Gleixner <tglx@linutronix.de>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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2021-01-20 20:50 [dynticks:preempt/dynamic-v4 8/8] arch/x86/include/asm/entry-common.h:20:25: error: implicit declaration of function 'native_save_fl' kernel test robot
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