# git rev-parse -q --verify 24be4d0b46bb0c3c1dc7bacd30957d6144a70dfc^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/linus master
# git rev-parse -q --verify 24be4d0b46bb0c3c1dc7bacd30957d6144a70dfc^{commit}
24be4d0b46bb0c3c1dc7bacd30957d6144a70dfc
# git checkout -q -f -B kisskb 24be4d0b46bb0c3c1dc7bacd30957d6144a70dfc
# git clean -qxdf
# < git log -1
# commit 24be4d0b46bb0c3c1dc7bacd30957d6144a70dfc
# Author: SeongJae Park <sj@kernel.org>
# Date:   Tue Jul 4 01:00:03 2023 +0000
# 
#     arch/arm64/mm/fault: Fix undeclared variable error in do_page_fault()
#     
#     Commit ae870a68b5d1 ("arm64/mm: Convert to using
#     lock_mm_and_find_vma()") made do_page_fault() to use 'vma' even if
#     CONFIG_PER_VMA_LOCK is not defined, but the declaration is still in the
#     ifdef.
#     
#     As a result, building kernel without the config fails with undeclared
#     variable error as below:
#     
#         arch/arm64/mm/fault.c: In function 'do_page_fault':
#         arch/arm64/mm/fault.c:624:2: error: 'vma' undeclared (first use in this function); did you mean 'vmap'?
#           624 |  vma = lock_mm_and_find_vma(mm, addr, regs);
#               |  ^~~
#               |  vmap
#     
#     Fix it by moving the declaration out of the ifdef.
#     
#     Fixes: ae870a68b5d1 ("arm64/mm: Convert to using lock_mm_and_find_vma()")
#     Signed-off-by: SeongJae Park <sj@kernel.org>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-8.5.0-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.5.0-nolibc/x86_64-linux/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 24be4d0b46bb0c3c1dc7bacd30957d6144a70dfc
# make -s -j 40 ARCH=x86_64 O=/kisskb/build/linus_allnoconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.5.0-nolibc/x86_64-linux/bin/x86_64-linux-  allnoconfig
# < make -s -j 40 ARCH=x86_64 O=/kisskb/build/linus_allnoconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.5.0-nolibc/x86_64-linux/bin/x86_64-linux-  help
# make -s -j 40 ARCH=x86_64 O=/kisskb/build/linus_allnoconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.5.0-nolibc/x86_64-linux/bin/x86_64-linux-  olddefconfig
# make -s -j 40 ARCH=x86_64 O=/kisskb/build/linus_allnoconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.5.0-nolibc/x86_64-linux/bin/x86_64-linux-  
Completed OK
# rm -rf /kisskb/build/linus_allnoconfig_x86_64-gcc8
# Build took: 0:00:25.009146