Buildresult: linus/ppc40x_defconfig/powerpc-gcc4.6 built on Mar 19 2020, 04:22

kisskb

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Status:	OK
Date/Time:	Mar 19 2020, 04:22
Duration:	0:00:51.879401
Builder:	ka1
Revision:	mm: slub: be more careful about the double cmpxchg of freelist (`5076190daded2197f62fe92cf69674488be44175)`
Target:	linus/ppc40x_defconfig/powerpc-gcc4.6
Branch:	linus
Compiler:	powerpc-gcc4.6 (powerpc-linux-gcc (GCC) 4.6.3 / GNU ld (GNU Binutils) 2.22)
Config:	ppc40x_defconfig (download)
Log:	Download original Possible warnings (5) kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] include/linux/list.h:72:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] fs/ext4/extents.c:5009:23: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] drivers/tty/serial/8250/8250_core.c:247:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] fs/io_uring.c:5842:13: warning: 'err' may be used uninitialized in this function [-Wuninitialized] Full Log # git rev-parse -q --verify 5076190daded2197f62fe92cf69674488be44175^{commit} 5076190daded2197f62fe92cf69674488be44175 already have revision, skipping fetch # git checkout -q -f -B kisskb 5076190daded2197f62fe92cf69674488be44175 # git clean -qxdf # < git log -1 # commit 5076190daded2197f62fe92cf69674488be44175 # Author: Linus Torvalds <torvalds@linux-foundation.org> # Date: Tue Mar 17 11:04:09 2020 -0700 # # mm: slub: be more careful about the double cmpxchg of freelist # # This is just a cleanup addition to Jann's fix to properly update the # transaction ID for the slub slowpath in commit fd4d9c7d0c71 ("mm: slub: # add missing TID bump.."). # # The transaction ID is what protects us against any concurrent accesses, # but we should really also make sure to make the 'freelist' comparison # itself always use the same freelist value that we then used as the new # next free pointer. # # Jann points out that if we do all of this carefully, we could skip the # transaction ID update for all the paths that only remove entries from # the lists, and only update the TID when adding entries (to avoid the ABA # issue with cmpxchg and list handling re-adding a previously seen value). # # But this patch just does the "make sure to cmpxchg the same value we # used" rather than then try to be clever. # # Acked-by: Jann Horn <jannh@google.com> # Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version # < git log --format=%s --max-count=1 5076190daded2197f62fe92cf69674488be44175 # < make -s -j 48 ARCH=powerpc O=/kisskb/build/linus_ppc40x_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- ppc40x_defconfig # < make -s -j 48 ARCH=powerpc O=/kisskb/build/linus_ppc40x_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- help # make -s -j 48 ARCH=powerpc O=/kisskb/build/linus_ppc40x_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- olddefconfig # make -s -j 48 ARCH=powerpc O=/kisskb/build/linus_ppc40x_defconfig_powerpc-gcc4.6 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:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c: In function 'proc_reg_open': /kisskb/src/include/linux/list.h:72:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:338:21: note: 'pdeo' was declared here /kisskb/src/fs/ext4/extents.c: In function 'ext4_convert_unwritten_io_end_vec': /kisskb/src/fs/ext4/extents.c:5009:23: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq': /kisskb/src/drivers/tty/serial/8250/8250_core.c:247:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c:227:19: note: 'i' was declared here /kisskb/src/fs/io_uring.c: In function '__io_sqe_files_update.isra.82': /kisskb/src/fs/io_uring.c:5842:13: warning: 'err' may be used uninitialized in this function [-Wuninitialized] INFO: Uncompressed kernel (size 0x58006c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x58006c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x58006c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x58006c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x56fa24) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) Image Name: Linux-5.6.0-rc6-g5076190daded Created: Thu Mar 19 04:23:07 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2745735 Bytes = 2681.38 KiB = 2.62 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.6.0-rc6-g5076190daded Created: Thu Mar 19 04:23:07 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2777780 Bytes = 2712.68 KiB = 2.65 MiB Load Address: 00600000 Entry Point: 006019cc Image Name: Linux-5.6.0-rc6-g5076190daded Created: Thu Mar 19 04:23:07 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2777566 Bytes = 2712.47 KiB = 2.65 MiB Load Address: 00600000 Entry Point: 00601758 Completed OK # rm -rf /kisskb/build/linus_ppc40x_defconfig_powerpc-gcc4.6 # Build took: 0:00:51.879401

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