Buildresult: powerpc-next/44x/icon_defconfig/powerpc-gcc4.6 built on Jan 30 2020, 00:58

kisskb

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Status:	OK
Date/Time:	Jan 30 2020, 00:58
Duration:	0:00:38.921147
Builder:	ka3
Revision:	powerpc/32s: Fix CPU wake-up from sleep mode (`9933819099c4600b41a042f27a074470a43cf6b9)`
Target:	powerpc-next/44x/icon_defconfig/powerpc-gcc4.6
Branch:	powerpc-next
Compiler:	powerpc-gcc4.6 (powerpc-linux-gcc (GCC) 4.6.3 / GNU ld (GNU Binutils) 2.22)
Config:	44x/icon_defconfig (download)
Log:	Download original Possible warnings (6) kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] drivers/base/regmap/regmap.c:2591:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] drivers/base/regmap/regmap.c:1852:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] fs/ext4/extents.c:5054:23: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] drivers/tty/serial/8250/8250_core.c:248:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] Full Log # git rev-parse -q --verify 9933819099c4600b41a042f27a074470a43cf6b9^{commit} 9933819099c4600b41a042f27a074470a43cf6b9 already have revision, skipping fetch # git checkout -q -f -B kisskb 9933819099c4600b41a042f27a074470a43cf6b9 # git clean -qxdf # < git log -1 # commit 9933819099c4600b41a042f27a074470a43cf6b9 # Author: Christophe Leroy <christophe.leroy@c-s.fr> # Date: Mon Jan 27 10:42:04 2020 +0000 # # powerpc/32s: Fix CPU wake-up from sleep mode # # Commit f7354ccac844 ("powerpc/32: Remove CURRENT_THREAD_INFO and # rename TI_CPU") broke the CPU wake-up from sleep mode (i.e. when # _TLF_SLEEPING is set) by delaying the tovirt(r2, r2). # # This is because r2 is not restored by fast_exception_return. It used # to work (by chance ?) because CPU wake-up interrupt never comes from # user, so r2 is expected to point to 'current' on return. # # Commit e2fb9f544431 ("powerpc/32: Prepare for Kernel Userspace Access # Protection") broke it even more by clobbering r0 which is not # restored by fast_exception_return either. # # Use r6 instead of r0. This is possible because r3-r6 are restored by # fast_exception_return and only r3-r5 are used for exception arguments. # # For r2 it could be converted back to virtual address, but stay on the # safe side and restore it from the stack instead. It should be live # in the cache at that moment, so loading from the stack should make # no difference compared to converting it from phys to virt. # # Fixes: f7354ccac844 ("powerpc/32: Remove CURRENT_THREAD_INFO and rename TI_CPU") # Fixes: e2fb9f544431 ("powerpc/32: Prepare for Kernel Userspace Access Protection") # Cc: stable@vger.kernel.org # Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # Link: https://lore.kernel.org/r/6d02c3ae6ad77af34392e98117e44c2bf6d13ba1.1580121710.git.christophe.leroy@c-s.fr # < /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 9933819099c4600b41a042f27a074470a43cf6b9 # < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_44x_icon_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- 44x/icon_defconfig # make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_44x_icon_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/drivers/base/regmap/regmap.c: In function 'regmap_raw_read': /kisskb/src/drivers/base/regmap/regmap.c:2591:6: 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:1852:6: warning: 'ret' 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:65:12: 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:5054:23: 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:248:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c:228:19: note: 'i' was declared here Completed OK # rm -rf /kisskb/build/powerpc-next_44x_icon_defconfig_powerpc-gcc4.6 # Build took: 0:00:38.921147

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