# git rev-parse -q --verify 0be47634db0baa9e91c7e635e7e73355d6a5cf43^{commit} 0be47634db0baa9e91c7e635e7e73355d6a5cf43 already have revision, skipping fetch # git checkout -q -f -B kisskb 0be47634db0baa9e91c7e635e7e73355d6a5cf43 # git clean -qxdf # < git log -1 # commit 0be47634db0baa9e91c7e635e7e73355d6a5cf43 # Author: Gautham R. Shenoy # Date: Thu Dec 10 16:08:59 2020 +0530 # # powerpc/cacheinfo: Print correct cache-sibling map/list for L2 cache # # On POWER platforms where only some groups of threads within a core # share the L2-cache (indicated by the ibm,thread-groups device-tree # property), we currently print the incorrect shared_cpu_map/list for # L2-cache in the sysfs. # # This patch reports the correct shared_cpu_map/list on such platforms. # # Example: # On a platform with "ibm,thread-groups" set to # 00000001 00000002 00000004 00000000 # 00000002 00000004 00000006 00000001 # 00000003 00000005 00000007 00000002 # 00000002 00000004 00000000 00000002 # 00000004 00000006 00000001 00000003 # 00000005 00000007 # # This indicates that threads {0,2,4,6} in the core share the L2-cache # and threads {1,3,5,7} in the core share the L2 cache. # # However, without the patch, the shared_cpu_map/list for L2 for CPUs 0, # 1 is reported in the sysfs as follows: # # /sys/devices/system/cpu/cpu0/cache/index2/shared_cpu_list:0-7 # /sys/devices/system/cpu/cpu0/cache/index2/shared_cpu_map:000000,000000ff # # /sys/devices/system/cpu/cpu1/cache/index2/shared_cpu_list:0-7 # /sys/devices/system/cpu/cpu1/cache/index2/shared_cpu_map:000000,000000ff # # With the patch, the shared_cpu_map/list for L2 cache for CPUs 0, 1 is # correctly reported as follows: # # /sys/devices/system/cpu/cpu0/cache/index2/shared_cpu_list:0,2,4,6 # /sys/devices/system/cpu/cpu0/cache/index2/shared_cpu_map:000000,00000055 # # /sys/devices/system/cpu/cpu1/cache/index2/shared_cpu_list:1,3,5,7 # /sys/devices/system/cpu/cpu1/cache/index2/shared_cpu_map:000000,000000aa # # This patch also defines cpu_l2_cache_mask() for !CONFIG_SMP case. # # Signed-off-by: Gautham R. Shenoy # Signed-off-by: Michael Ellerman # Link: https://lore.kernel.org/r/1607596739-32439-6-git-send-email-ego@linux.vnet.ibm.com # < /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 0be47634db0baa9e91c7e635e7e73355d6a5cf43 # < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_smp_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- mpc85xx_smp_defconfig # < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_smp_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_smp_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig # make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_smp_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/kernel.h:11:0, from /kisskb/src/include/linux/list.h:9, from /kisskb/src/include/linux/module.h:12, from /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:15: /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c: In function 'allocate_bd': /kisskb/src/include/linux/err.h:22:49: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] #define IS_ERR_VALUE(x) unlikely((unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO) ^ /kisskb/src/include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:139:6: note: in expansion of macro 'IS_ERR_VALUE' if (IS_ERR_VALUE(fep->ring_mem_addr)) ^ cc1: fatal error: opening output file arch/powerpc/boot/dts/fsl/.mpc8540ads.dtb.dts.tmp: No such file or directory compilation terminated. make[2]: *** [scripts/Makefile.lib:326: arch/powerpc/boot/dts/fsl/mpc8540ads.dtb] Error 1 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [arch/powerpc/Makefile:294: zImage] Error 2 make[1]: *** Waiting for unfinished jobs.... make: *** [Makefile:185: __sub-make] Error 2 Command 'make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc85xx_smp_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- ' returned non-zero exit status 2 # rm -rf /kisskb/build/powerpc-next_mpc85xx_smp_defconfig_powerpc-gcc4.9 # Build took: 0:02:05.661475