# 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/mips-linux/bin/mips-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux-ld --version
# < git log --format=%s --max-count=1 c145ff82749b4daa660ab4739f5412b2d62e2d8a
# < make -s -j 8 ARCH=mips O=/kisskb/build/powerpc-next_mips-defconfig_mips CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux-  defconfig
# make -s -j 8 ARCH=mips O=/kisskb/build/powerpc-next_mips-defconfig_mips CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux-  
/kisskb/src/arch/mips/vdso/Makefile:61: MIPS VDSO requires binutils >= 2.25
/kisskb/src/arch/mips/vdso/Makefile:61: MIPS VDSO requires binutils >= 2.25
/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/kernel/rcu/srcutree.c: In function 'init_srcu_struct_fields':
/kisskb/src/kernel/rcu/srcutree.c:140:32: warning: 'levelspread[<U4e60>]' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c:88:6: note: 'levelspread[<U4e60>]' was declared here
/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/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/net/bridge/br_netlink.c: In function 'br_afspec.isra.22':
/kisskb/src/net/bridge/br_netlink.c:648:7: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/net/core/devlink.c: In function 'devlink_fmsg_prepare_skb':
/kisskb/src/net/core/devlink.c:4484:6: warning: 'err' 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/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
/kisskb/src/drivers/usb/core/devio.c: In function 'async_completed':
/kisskb/src/drivers/usb/core/devio.c:625:23: warning: 'errno' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/arch/mips/vdso/Makefile:61: MIPS VDSO requires binutils >= 2.25
/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]
FIT description: Linux 5.4.0-rc2-gc145ff82749b
Created:         Thu Oct 17 11:00:03 2019
 Image 0 (kernel@0)
  Description:  Linux 5.4.0-rc2-gc145ff82749b
  Created:      Thu Oct 17 11:00:03 2019
  Type:         Kernel Image
  Compression:  gzip compressed
  Data Size:    4582769 Bytes = 4475.36 KiB = 4.37 MiB
  Architecture: MIPS
  OS:           Linux
  Load Address: 0x80100000
  Entry Point:  0x8087bc90
  Hash algo:    sha1
  Hash value:   f3d71b52daeb3a6971e92f6939492694f58d174c
 Image 1 (fdt@boston)
  Description:  img,boston Device Tree
  Created:      Thu Oct 17 11:00:03 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    3793 Bytes = 3.70 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   4799f50d688573234da6e9d7701234d394759ef4
 Image 2 (fdt@ni169445)
  Description:  NI 169445 device tree
  Created:      Thu Oct 17 11:00:03 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    1871 Bytes = 1.83 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   51b89b31605ee62038c8468c429af091dfc75ec7
 Image 3 (fdt@ocelot_pcb123)
  Description:  MSCC Ocelot PCB123 Device Tree
  Created:      Thu Oct 17 11:00:03 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    4639 Bytes = 4.53 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   018897896b42c41c943aca35a20e4300dba250c8
 Image 4 (fdt@ocelot_pcb120)
  Description:  MSCC Ocelot PCB120 Device Tree
  Created:      Thu Oct 17 11:00:03 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    5198 Bytes = 5.08 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   36c7bd0bd79cfc2f7dd6acda6c7996294f4967e6
 Image 5 (fdt@xilfpga)
  Description:  MIPSfpga (xilfpga) Device Tree
  Created:      Thu Oct 17 11:00:03 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    2708 Bytes = 2.64 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   63d058b780f65e22da30f0a183433765f1807f1d
 Default Configuration: 'conf@default'
 Configuration 0 (conf@default)
  Description:  Generic Linux kernel
  Kernel:       kernel@0
 Configuration 1 (conf@boston)
  Description:  Boston Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@boston
 Configuration 2 (conf@ni169445)
  Description:  NI 169445 Linux Kernel
  Kernel:       kernel@0
  FDT:          fdt@ni169445
 Configuration 3 (conf@ocelot_pcb123)
  Description:  Ocelot Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@ocelot_pcb123
 Configuration 4 (conf@ocelot_pcb120)
  Description:  Ocelot Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@ocelot_pcb120
 Configuration 5 (conf@xilfpga)
  Description:  MIPSfpga Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@xilfpga
Completed OK
# rm -rf /kisskb/build/powerpc-next_mips-defconfig_mips
# Build took: 0:02:06.835223