Buildresult: powerpc-fixes/mpc5200_defconfig/powerpc-gcc4.6 built on Apr 13 2018, 00:26

kisskb

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Status:	OK
Date/Time:	Apr 13 2018, 00:26
Duration:	0:00:59.951327
Builder:	ka3
Revision:	powerpc/64s: Fix CPU_FTRS_ALWAYS vs DT CPU features (`7c8db8431b5bc1c37f6d2ce73d2e18a42b52c87d)`
Target:	powerpc-fixes/mpc5200_defconfig/powerpc-gcc4.6
Branch:	powerpc-fixes
Compiler:	powerpc-gcc4.6 (powerpc-linux-gcc (GCC) 4.6.3)
Config:	mpc5200_defconfig (download)
Log:	Download original Possible warnings (4) kernel/printk/printk.c:182:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] drivers/base/regmap/regmap.c:2497:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] drivers/base/regmap/regmap.c:1819:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] drivers/dma-buf/reservation.c:225:6: warning: 'k' may be used uninitialized in this function [-Wuninitialized] Full Log # git rev-parse -q --verify 7c8db8431b5bc1c37f6d2ce73d2e18a42b52c87d^{commit} 7c8db8431b5bc1c37f6d2ce73d2e18a42b52c87d already have revision, skipping fetch # git checkout -q -f -B kisskb 7c8db8431b5bc1c37f6d2ce73d2e18a42b52c87d # git clean -qxdf # < git log -1 # commit 7c8db8431b5bc1c37f6d2ce73d2e18a42b52c87d # Author: Michael Ellerman <mpe@ellerman.id.au> # Date: Thu Apr 12 22:24:45 2018 +1000 # # powerpc/64s: Fix CPU_FTRS_ALWAYS vs DT CPU features # # The cpu_has_feature() mechanism has an optimisation where at build # time we construct a mask of the CPU feature bits that will always be # true for the given .config, based on the platform/bitness/etc. that we # are building for. # # That is incompatible with DT CPU features, where the set of CPU # features is dependent on feature flags that are given to us by # firmware. # # The result is that some feature bits can not be disabled by DT CPU # features. Or more accurately, they can be disabled but they will still # appear in the ALWAYS mask, meaning cpu_has_feature() will always # return true for them. # # In the past this hasn't really been a problem because on Book3S # 64 (where we support DT CPU features), the set of ALWAYS bits has been # very small. That was because we always built for POWER4 and later, # meaning the set of common bits was small. # # The only bit that could be cleared by DT CPU features that was also in # the ALWAYS mask was CPU_FTR_NODSISRALIGN, and that was only used in # the alignment handler to create a fake DSISR. That code was itself # deleted in 31bfdb036f12 ("powerpc: Use instruction emulation # infrastructure to handle alignment faults") (Sep 2017). # # However the set of ALWAYS features changed with the recent commit # db5ae1c155af ("powerpc/64s: Refine feature sets for little endian # builds") which restricted the set of feature flags when building # little endian to Power7 or later. That caused the ALWAYS mask to # become much larger for little endian builds. # # The result is that the following feature bits can currently not # be disabled by DT CPU features: # # CPU_FTR_REAL_LE, CPU_FTR_MMCRA, CPU_FTR_CTRL, CPU_FTR_SMT, # CPU_FTR_PURR, CPU_FTR_SPURR, CPU_FTR_DSCR, CPU_FTR_PKEY, # CPU_FTR_VMX_COPY, CPU_FTR_CFAR, CPU_FTR_HAS_PPR. # # To fix it we need to mask the set of ALWAYS features with the base set # of DT CPU features, ie. the features that are always enabled by DT CPU # features. That way there are no bits in the ALWAYS mask that are not # also always set by DT CPU features. # # Fixes: db5ae1c155af ("powerpc/64s: Refine feature sets for little endian builds") # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < git log --format=%s --max-count=1 7c8db8431b5bc1c37f6d2ce73d2e18a42b52c87d # < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc5200_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- mpc5200_defconfig # make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc5200_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:182:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read': /kisskb/src/drivers/base/regmap/regmap.c:2497:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/base/regmap/regmap.c: In function '_regmap_raw_write': /kisskb/src/drivers/base/regmap/regmap.c:1819:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/dma-buf/reservation.c: In function 'reservation_object_add_shared_fence': /kisskb/src/drivers/dma-buf/reservation.c:225:6: warning: 'k' may be used uninitialized in this function [-Wuninitialized] INFO: Uncompressed kernel (size 0x6c60b8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) INFO: Uncompressed kernel (size 0x6c60b8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) INFO: Uncompressed kernel (size 0x6c60b8) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) INFO: Uncompressed kernel (size 0x6b5a0c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x700000) Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:27:44 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3372700 Bytes = 3293.65 kB = 3.22 MB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:27:44 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3396442 Bytes = 3316.84 kB = 3.24 MB Load Address: 00700000 Entry Point: 00700248 Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:27:44 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3396111 Bytes = 3316.51 kB = 3.24 MB Load Address: 00700000 Entry Point: 00700248 Image Name: Linux-4.16.0-g7c8db84 Created: Fri Apr 13 00:27:45 2018 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3396340 Bytes = 3316.74 kB = 3.24 MB Load Address: 00700000 Entry Point: 00700248 Completed OK # rm -rf /kisskb/build/powerpc-fixes_mpc5200_defconfig_powerpc # Build took: 0:00:59.951327

© Michael Ellerman 2006-2018.