# git rev-parse -q --verify c145ff82749b4daa660ab4739f5412b2d62e2d8a^{commit}
c145ff82749b4daa660ab4739f5412b2d62e2d8a
already have revision, skipping fetch
# git checkout -q -f -B kisskb c145ff82749b4daa660ab4739f5412b2d62e2d8a
# git clean -qxdf
# < git log -1
# commit c145ff82749b4daa660ab4739f5412b2d62e2d8a
# Author: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
# Date:   Tue Sep 17 18:08:51 2019 +0530
# 
#     powerpc/nvdimm: Update vmemmap_populated to check sub-section range
#     
#     With commit: 7cc7867fb061 ("mm/devm_memremap_pages: enable sub-section remap")
#     pmem namespaces are remapped in 2M chunks. On architectures like ppc64 we
#     can map the memmap area using 16MB hugepage size and that can cover
#     a memory range of 16G.
#     
#     While enabling new pmem namespaces, since memory is added in sub-section chunks,
#     before creating a new memmap mapping, kernel should check whether there is an
#     existing memmap mapping covering the new pmem namespace. Currently, this is
#     validated by checking whether the section covering the range is already
#     initialized or not. Considering there can be multiple namespaces in the same
#     section this can result in wrong validation. Update this to check for
#     sub-sections in the range. This is done by checking for all pfns in the range we
#     are mapping.
#     
#     We could optimize this by checking only just one pfn in each sub-section. But
#     since this is not fast-path we keep this simple.
#     
#     Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20190917123851.22553-1-aneesh.kumar@linux.ibm.com
# < /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 c145ff82749b4daa660ab4739f5412b2d62e2d8a
# < make -s -j 8 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc8272_ads_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  mpc8272_ads_defconfig
# make -s -j 8 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc8272_ads_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/net/tun.c: In function 'tun_get_user':
/kisskb/src/drivers/net/tun.c:1836:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/net/tun.c:1749:46: warning: 'linear' 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
INFO: Uncompressed kernel (size 0x571568) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x600000)
INFO: Uncompressed kernel (size 0x560f90) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x600000)
Image Name:   Linux-5.4.0-rc2-gc145ff82749b
Created:      Thu Oct 17 11:46:41 2019
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    2782861 Bytes = 2717.64 KiB = 2.65 MiB
Load Address: 00000000
Entry Point:  00000000
Image Name:   Linux-5.4.0-rc2-gc145ff82749b
Created:      Thu Oct 17 11:46:41 2019
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    2814370 Bytes = 2748.41 KiB = 2.68 MiB
Load Address: 00600000
Entry Point:  00600888
Completed OK
# rm -rf /kisskb/build/powerpc-next_mpc8272_ads_defconfig_powerpc-gcc4.6
# Build took: 0:01:08.255967