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Subjectarch/alpha/include/asm/mmu_context.h:160:2: error: implicit declaration of function 'task_thread_info'
Hi Felix,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 2bd6bf03f4c1c59381d62c61d03f6cc3fe71f66e
commit: 70539bd79500245cbb4c7af00572fcce540d0105 drm/amd: Update MEC HQD loading code for KFD
date: 5 weeks ago
config: alpha-allmodconfig (attached as .config)
compiler: alpha-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout 70539bd79500245cbb4c7af00572fcce540d0105
# save the attached .config to linux build tree
make.cross ARCH=alpha

All errors (new ones prefixed by >>):

In file included from include/linux/mmu_context.h:4:0,
from drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h:29,
from drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c:23:
arch/alpha/include/asm/mmu_context.h: In function 'ev5_switch_mm':
>> arch/alpha/include/asm/mmu_context.h:160:2: error: implicit declaration of function 'task_thread_info' [-Werror=implicit-function-declaration]
task_thread_info(next)->pcb.asn = mmc & HARDWARE_ASN_MASK;
^~~~~~~~~~~~~~~~
>> arch/alpha/include/asm/mmu_context.h:160:24: error: invalid type argument of '->' (have 'int')
task_thread_info(next)->pcb.asn = mmc & HARDWARE_ASN_MASK;
^~
arch/alpha/include/asm/mmu_context.h: In function 'init_new_context':
arch/alpha/include/asm/mmu_context.h:238:24: error: invalid type argument of '->' (have 'int')
task_thread_info(tsk)->pcb.ptbr
^~
arch/alpha/include/asm/mmu_context.h: In function 'enter_lazy_tlb':
arch/alpha/include/asm/mmu_context.h:252:23: error: invalid type argument of '->' (have 'int')
task_thread_info(tsk)->pcb.ptbr
^~
cc1: some warnings being treated as errors

vim +/task_thread_info +160 arch/alpha/include/asm/mmu_context.h

^1da177e4 include/asm-alpha/mmu_context.h Linus Torvalds 2005-04-16 156
^1da177e4 include/asm-alpha/mmu_context.h Linus Torvalds 2005-04-16 157 /* Always update the PCB ASN. Another thread may have allocated
^1da177e4 include/asm-alpha/mmu_context.h Linus Torvalds 2005-04-16 158 a new mm->context (via flush_tlb_mm) without the ASN serial
^1da177e4 include/asm-alpha/mmu_context.h Linus Torvalds 2005-04-16 159 number wrapping. We have no way to detect when this is needed. */
37bfbaf99 include/asm-alpha/mmu_context.h Al Viro 2006-01-12 @160 task_thread_info(next)->pcb.asn = mmc & HARDWARE_ASN_MASK;
^1da177e4 include/asm-alpha/mmu_context.h Linus Torvalds 2005-04-16 161 }
^1da177e4 include/asm-alpha/mmu_context.h Linus Torvalds 2005-04-16 162

:::::: The code at line 160 was first introduced by commit
:::::: 37bfbaf995d2c1f8196ee04c9d6f68258d5ec3e8 [PATCH] alpha: task_thread_info()

:::::: TO: Al Viro <viro@ftp.linux.org.uk>
:::::: CC: Linus Torvalds <torvalds@g5.osdl.org>

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