# git rev-parse -q --verify a00196a272161338d4b1d66ec69e3d57c6b280e0^{commit}
a00196a272161338d4b1d66ec69e3d57c6b280e0
already have revision, skipping fetch
# git checkout -q -f -B kisskb a00196a272161338d4b1d66ec69e3d57c6b280e0
# git clean -qxdf
# < git log -1
# commit a00196a272161338d4b1d66ec69e3d57c6b280e0
# Author: Nicholas Piggin <npiggin@gmail.com>
# Date:   Fri Jun 7 13:56:36 2019 +1000
# 
#     powerpc/64s: __find_linux_pte() synchronization vs pmdp_invalidate()
#     
#     The change to pmdp_invalidate() to mark the pmd with _PAGE_INVALID
#     broke the synchronisation against lock free lookups,
#     __find_linux_pte()'s pmd_none() check no longer returns true for such
#     cases.
#     
#     Fix this by adding a check for this condition as well.
#     
#     Fixes: da7ad366b497 ("powerpc/mm/book3s: Update pmd_present to look at _PAGE_PRESENT bit")
#     Cc: stable@vger.kernel.org # v4.20+
#     Suggested-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
#     Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
#     Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-gcc --version
# < /opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-ld --version
# < git log --format=%s --max-count=1 a00196a272161338d4b1d66ec69e3d57c6b280e0
# < make -s -j 48 ARCH=sparc64 O=/kisskb/build/powerpc-fixes_sparc64-defconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  defconfig
# make -s -j 48 ARCH=sparc64 O=/kisskb/build/powerpc-fixes_sparc64-defconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  
/kisskb/src/net/ipv4/fib_semantics.c: In function 'fib_check_nh_v4_gw':
/kisskb/src/net/ipv4/fib_semantics.c:1027:12: warning: 'err' may be used uninitialized in this function [-Wmaybe-uninitialized]
   if (!tbl || err) {
            ^
WARNING: EXPORT symbol "_mcount" [vmlinux] version generation failed, symbol will not be versioned.
WARNING: EXPORT symbol "_mcount" [vmlinux] version generation failed, symbol will not be versioned.
  kernel: arch/sparc/boot/image is ready
  kernel: arch/sparc/boot/zImage is ready
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_sparc64-defconfig_sparc64
# Build took: 0:01:05.848299