# git rev-parse -q --verify 4c205c84e249e0a91dcfabe461d77667ec9b2d05^{commit}
4c205c84e249e0a91dcfabe461d77667ec9b2d05
already have revision, skipping fetch
# git checkout -q -f -B kisskb 4c205c84e249e0a91dcfabe461d77667ec9b2d05
# git clean -qxdf
# < git log -1
# commit 4c205c84e249e0a91dcfabe461d77667ec9b2d05
# Merge: ea9448b254e2 4f0882491a14
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sat Apr 4 12:24:47 2020 -0700
# 
#     Merge tag 'keys-fixes-20200329' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
#     
#     Pull keyrings fixes from David Howells:
#      "Here's a couple of patches that fix a circular dependency between
#       holding key->sem and mm->mmap_sem when reading data from a key.
#     
#       One potential issue is that a filesystem looking to use a key inside,
#       say, ->readpages() could deadlock if the key being read is the key
#       that's required and the buffer the key is being read into is on a page
#       that needs to be fetched.
#     
#       The case actually detected is a bit more involved - with a filesystem
#       calling request_key() and locking the target keyring for write - which
#       could be being read"
#     
#     * tag 'keys-fixes-20200329' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
#       KEYS: Avoid false positive ENOMEM error on key read
#       KEYS: Don't write out to userspace while holding key semaphore
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/mips-linux/bin/mips-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/mips-linux/bin/mips-linux-ld --version
# < git log --format=%s --max-count=1 4c205c84e249e0a91dcfabe461d77667ec9b2d05
# < make -s -j 48 ARCH=mips O=/kisskb/build/linus_mips-allnoconfig_mips-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/mips-linux/bin/mips-linux-  allnoconfig
# < make -s -j 48 ARCH=mips O=/kisskb/build/linus_mips-allnoconfig_mips-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/mips-linux/bin/mips-linux-  help
# make -s -j 48 ARCH=mips O=/kisskb/build/linus_mips-allnoconfig_mips-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/mips-linux/bin/mips-linux-  olddefconfig
# make -s -j 48 ARCH=mips O=/kisskb/build/linus_mips-allnoconfig_mips-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/mips-linux/bin/mips-linux-  
FIT description: Linux 5.6.0+
Created:         Sun Apr  5 09:04:46 2020
 Image 0 (kernel@0)
  Description:  Linux 5.6.0+
  Created:      Sun Apr  5 09:04:46 2020
  Type:         Kernel Image
  Compression:  gzip compressed
  Data Size:    664394 Bytes = 648.82 KiB = 0.63 MiB
  Architecture: MIPS
  OS:           Linux
  Load Address: 0x80100000
  Entry Point:  0x80228cc0
  Hash algo:    sha1
  Hash value:   8797ce0c232b1c4b299f5c658e42517e712c0535
 Default Configuration: 'conf@default'
 Configuration 0 (conf@default)
  Description:  Generic Linux kernel
  Kernel:       kernel@0
Completed OK
# rm -rf /kisskb/build/linus_mips-allnoconfig_mips-gcc4.9
# Build took: 0:00:16.106894