# git rev-parse -q --verify 6aa254f8d119df235963fd718d145317512963ac^{commit}
6aa254f8d119df235963fd718d145317512963ac
already have revision, skipping fetch
# git checkout -q -f -B kisskb 6aa254f8d119df235963fd718d145317512963ac
# git clean -qxdf
# < git log -1
# commit 6aa254f8d119df235963fd718d145317512963ac
# Author: Cédric Le Goater <clg@kaod.org>
# Date:   Fri Oct 4 13:24:36 2019 +0200
# 
#     mtd: spi-nor: aspeed: Add read training support for the AST2600
#     
#     The read training algorithm consists of finding the appropriate read
#     timing delays for the HCLK dividers in range [ 2 - 5 ] and store the
#     results in the Read Timing Compensation register. The previous AST2500
#     and AST2400 SoCs were covering a broader HCLK range [ 1 - 5 ] because
#     the AHB frequency was lower.
#     
#     The algorithm first reads a golden buffer at low speed and then
#     performs reads with different clocks and delay cycle settings to find
#     a breaking point. This selects the default clock frequency for the CEx
#     control register. The current settings are bit optimistic as we pick
#     the first delay giving good results. A safer approach would be to
#     determine an interval and choose the middle value. We might change the
#     approach depending on the results on other systems.
#     
#     Signed-off-by: Cédric Le Goater <clg@kaod.org>
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 6aa254f8d119df235963fd718d145317512963ac
# < make -s -j 24 ARCH=powerpc O=/kisskb/build/cdrx_ppc64_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  ppc64_defconfig
# < make -s -j 24 ARCH=powerpc O=/kisskb/build/cdrx_ppc64_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 24 ARCH=powerpc O=/kisskb/build/cdrx_ppc64_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 24 ARCH=powerpc O=/kisskb/build/cdrx_ppc64_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  
In file included from /kisskb/src/include/linux/list.h:9:0,
                 from /kisskb/src/include/linux/wait.h:7,
                 from /kisskb/src/include/linux/wait_bit.h:8,
                 from /kisskb/src/include/linux/fs.h:6,
                 from /kisskb/src/fs/btrfs/send.c:7:
/kisskb/src/fs/btrfs/send.c: In function 'process_extent':
/kisskb/src/include/linux/kernel.h:37:33: warning: 'clone_src_i_size' may be used uninitialized in this function [-Wmaybe-uninitialized]
 #define IS_ALIGNED(x, a)  (((x) & ((typeof(x))(a) - 1)) == 0)
                                 ^
/kisskb/src/fs/btrfs/send.c:5088:6: note: 'clone_src_i_size' was declared here
  u64 clone_src_i_size;
      ^
Completed OK
# rm -rf /kisskb/build/cdrx_ppc64_defconfig_powerpc-gcc4.9
# Build took: 0:03:49.014988