# git rev-parse -q --verify d5c243989fb0cb03c74d7340daca3b819f706ee7^{commit}
d5c243989fb0cb03c74d7340daca3b819f706ee7
already have revision, skipping fetch
# git checkout -q -f -B kisskb d5c243989fb0cb03c74d7340daca3b819f706ee7
# git clean -qxdf
# < git log -1
# commit d5c243989fb0cb03c74d7340daca3b819f706ee7
# Author: Christophe Leroy <christophe.leroy@csgroup.eu>
# Date:   Mon Dec 21 06:18:03 2020 +0000
# 
#     powerpc/32: Fix vmap stack - Properly set r1 before activating MMU on syscall too
#     
#     We need r1 to be properly set before activating MMU, otherwise any new
#     exception taken while saving registers into the stack in syscall
#     prologs will use the user stack, which is wrong and will even lockup
#     or crash when KUAP is selected.
#     
#     Do that by switching the meaning of r11 and r1 until we have saved r1
#     to the stack: copy r1 into r11 and setup the new stack pointer in r1.
#     To avoid complicating and impacting all generic and specific prolog
#     code (and more), copy back r1 into r11 once r11 is save onto
#     the stack.
#     
#     We could get rid of copying r1 back and forth at the cost of rewriting
#     everything to use r1 instead of r11 all the way when CONFIG_VMAP_STACK
#     is set, but the effort is probably not worth it for now.
#     
#     Fixes: da7bb43ab9da ("powerpc/32: Fix vmap stack - Properly set r1 before activating MMU")
#     Cc: stable@vger.kernel.org # v5.10+
#     Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/a3d819d5c348cee9783a311d5d3f3ba9b48fd219.1608531452.git.christophe.leroy@csgroup.eu
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-ld --version
# < git log --format=%s --max-count=1 d5c243989fb0cb03c74d7340daca3b819f706ee7
# < make -s -j 48 ARCH=ia64 O=/kisskb/build/powerpc-fixes_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-  defconfig
arch/ia64/configs/generic_defconfig:58:warning: override: reassigning to symbol ATA
arch/ia64/configs/generic_defconfig:59:warning: override: reassigning to symbol ATA_PIIX
# < make -s -j 48 ARCH=ia64 O=/kisskb/build/powerpc-fixes_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-  help
# make -s -j 48 ARCH=ia64 O=/kisskb/build/powerpc-fixes_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-  olddefconfig
# make -s -j 48 ARCH=ia64 O=/kisskb/build/powerpc-fixes_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-  
<stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp]
In file included from /kisskb/src/include/linux/numa.h:25:0,
                 from /kisskb/src/include/linux/async.h:13,
                 from /kisskb/src/kernel/async.c:47:
/kisskb/src/arch/ia64/include/asm/sparsemem.h:14:40: warning: "PAGE_SHIFT" is not defined [-Wundef]
 #if ((CONFIG_FORCE_MAX_ZONEORDER - 1 + PAGE_SHIFT) > SECTION_SIZE_BITS)
                                        ^
In file included from /kisskb/src/include/linux/gfp.h:6:0,
                 from /kisskb/src/include/linux/xarray.h:14,
                 from /kisskb/src/include/linux/radix-tree.h:19,
                 from /kisskb/src/include/linux/idr.h:15,
                 from /kisskb/src/include/linux/kernfs.h:13,
                 from /kisskb/src/include/linux/sysfs.h:16,
                 from /kisskb/src/include/linux/kobject.h:20,
                 from /kisskb/src/include/linux/energy_model.h:7,
                 from /kisskb/src/include/linux/device.h:16,
                 from /kisskb/src/include/linux/async.h:14,
                 from /kisskb/src/kernel/async.c:47:
/kisskb/src/include/linux/mmzone.h:1156:2: error: #error Allocator MAX_ORDER exceeds SECTION_SIZE
 #error Allocator MAX_ORDER exceeds SECTION_SIZE
  ^
make[2]: *** [/kisskb/src/scripts/Makefile.build:279: kernel/async.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1805: kernel] Error 2
make[1]: *** Waiting for unfinished jobs....
In file included from /kisskb/src/arch/ia64/include/uapi/asm/intrinsics.h:22:0,
                 from /kisskb/src/arch/ia64/include/asm/intrinsics.h:11,
                 from /kisskb/src/arch/ia64/include/asm/timex.h:14,
                 from /kisskb/src/include/linux/timex.h:65,
                 from /kisskb/src/include/linux/time32.h:13,
                 from /kisskb/src/include/linux/time.h:60,
                 from /kisskb/src/fs/nfs/read.c:11:
/kisskb/src/fs/nfs/read.c: In function 'nfs_read_completion':
/kisskb/src/arch/ia64/include/uapi/asm/cmpxchg.h:57:2: warning: value computed is not used [-Wunused-value]
 ((__typeof__(*(ptr))) __xchg((unsigned long) (x), (ptr), sizeof(*(ptr))))
  ^
/kisskb/src/fs/nfs/read.c:196:5: note: in expansion of macro 'xchg'
     xchg(&nfs_req_openctx(req)->error, error);
     ^
/kisskb/src/fs/nfs/read.c: In function 'nfs_readpage':
/kisskb/src/arch/ia64/include/uapi/asm/cmpxchg.h:57:2: warning: value computed is not used [-Wunused-value]
 ((__typeof__(*(ptr))) __xchg((unsigned long) (x), (ptr), sizeof(*(ptr))))
  ^
/kisskb/src/fs/nfs/read.c:355:2: note: in expansion of macro 'xchg'
  xchg(&ctx->error, 0);
  ^
In file included from /kisskb/src/include/linux/numa.h:25:0,
                 from /kisskb/src/include/linux/async.h:13,
                 from /kisskb/src/drivers/base/bus.c:11:
/kisskb/src/arch/ia64/include/asm/sparsemem.h:14:40: warning: "PAGE_SHIFT" is not defined [-Wundef]
 #if ((CONFIG_FORCE_MAX_ZONEORDER - 1 + PAGE_SHIFT) > SECTION_SIZE_BITS)
                                        ^
In file included from /kisskb/src/include/linux/gfp.h:6:0,
                 from /kisskb/src/include/linux/xarray.h:14,
                 from /kisskb/src/include/linux/radix-tree.h:19,
                 from /kisskb/src/include/linux/idr.h:15,
                 from /kisskb/src/include/linux/kernfs.h:13,
                 from /kisskb/src/include/linux/sysfs.h:16,
                 from /kisskb/src/include/linux/kobject.h:20,
                 from /kisskb/src/include/linux/energy_model.h:7,
                 from /kisskb/src/include/linux/device.h:16,
                 from /kisskb/src/include/linux/async.h:14,
                 from /kisskb/src/drivers/base/bus.c:11:
/kisskb/src/include/linux/mmzone.h:1156:2: error: #error Allocator MAX_ORDER exceeds SECTION_SIZE
 #error Allocator MAX_ORDER exceeds SECTION_SIZE
  ^
make[3]: *** [/kisskb/src/scripts/Makefile.build:279: drivers/base/bus.o] Error 1
make[2]: *** [/kisskb/src/scripts/Makefile.build:496: drivers/base] Error 2
make[2]: *** Waiting for unfinished jobs....
In file included from /kisskb/src/include/linux/numa.h:25:0,
                 from /kisskb/src/include/linux/nodemask.h:96,
                 from /kisskb/src/include/linux/mount.h:15,
                 from /kisskb/src/fs/pnode.c:9:
/kisskb/src/arch/ia64/include/asm/sparsemem.h:14:40: warning: "PAGE_SHIFT" is not defined [-Wundef]
 #if ((CONFIG_FORCE_MAX_ZONEORDER - 1 + PAGE_SHIFT) > SECTION_SIZE_BITS)
                                        ^
In file included from /kisskb/src/include/linux/gfp.h:6:0,
                 from /kisskb/src/include/linux/xarray.h:14,
                 from /kisskb/src/include/linux/radix-tree.h:19,
                 from /kisskb/src/include/linux/fs.h:15,
                 from /kisskb/src/fs/pnode.c:10:
/kisskb/src/include/linux/mmzone.h:1156:2: error: #error Allocator MAX_ORDER exceeds SECTION_SIZE
 #error Allocator MAX_ORDER exceeds SECTION_SIZE
  ^
make[2]: *** [/kisskb/src/scripts/Makefile.build:279: fs/pnode.o] Error 1
make[2]: *** Waiting for unfinished jobs....
/kisskb/src/drivers/gpu/drm/ttm/ttm_pool.c:240:21: warning: 'ttm_pool_type_count' defined but not used [-Wunused-function]
 static unsigned int ttm_pool_type_count(struct ttm_pool_type *pt)
                     ^
In file included from /kisskb/src/include/linux/numa.h:25:0,
                 from /kisskb/src/include/linux/nodemask.h:96,
                 from /kisskb/src/lib/nodemask.c:2:
/kisskb/src/arch/ia64/include/asm/sparsemem.h:14:40: warning: "PAGE_SHIFT" is not defined [-Wundef]
 #if ((CONFIG_FORCE_MAX_ZONEORDER - 1 + PAGE_SHIFT) > SECTION_SIZE_BITS)
                                        ^
In file included from /kisskb/src/include/linux/gfp.h:6:0,
                 from /kisskb/src/include/linux/umh.h:4,
                 from /kisskb/src/include/linux/kmod.h:9,
                 from /kisskb/src/include/linux/module.h:16,
                 from /kisskb/src/lib/nodemask.c:3:
/kisskb/src/include/linux/mmzone.h:1156:2: error: #error Allocator MAX_ORDER exceeds SECTION_SIZE
 #error Allocator MAX_ORDER exceeds SECTION_SIZE
  ^
make[2]: *** [/kisskb/src/scripts/Makefile.build:279: lib/nodemask.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1805: lib] Error 2
In file included from /kisskb/src/include/linux/numa.h:25:0,
                 from /kisskb/src/include/linux/async.h:13,
                 from /kisskb/src/drivers/acpi/battery.c:13:
/kisskb/src/arch/ia64/include/asm/sparsemem.h:14:40: warning: "PAGE_SHIFT" is not defined [-Wundef]
 #if ((CONFIG_FORCE_MAX_ZONEORDER - 1 + PAGE_SHIFT) > SECTION_SIZE_BITS)
                                        ^
In file included from /kisskb/src/include/linux/gfp.h:6:0,
                 from /kisskb/src/include/linux/xarray.h:14,
                 from /kisskb/src/include/linux/radix-tree.h:19,
                 from /kisskb/src/include/linux/idr.h:15,
                 from /kisskb/src/include/linux/kernfs.h:13,
                 from /kisskb/src/include/linux/sysfs.h:16,
                 from /kisskb/src/include/linux/kobject.h:20,
                 from /kisskb/src/include/linux/energy_model.h:7,
                 from /kisskb/src/include/linux/device.h:16,
                 from /kisskb/src/include/linux/async.h:14,
                 from /kisskb/src/drivers/acpi/battery.c:13:
/kisskb/src/include/linux/mmzone.h:1156:2: error: #error Allocator MAX_ORDER exceeds SECTION_SIZE
 #error Allocator MAX_ORDER exceeds SECTION_SIZE
  ^
make[3]: *** [/kisskb/src/scripts/Makefile.build:279: drivers/acpi/battery.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1805: fs] Error 2
make[2]: *** [/kisskb/src/scripts/Makefile.build:496: drivers/acpi] Error 2
make[1]: *** [/kisskb/src/Makefile:1805: drivers] Error 2
make: *** [Makefile:185: __sub-make] Error 2
Command 'make -s -j 48 ARCH=ia64 O=/kisskb/build/powerpc-fixes_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/powerpc-fixes_ia64-defconfig_ia64-gcc4.9
# Build took: 0:01:42.217557