# git rev-parse -q --verify 397758385ba96da48a96f82cf3521f994f3a78b3^{commit}
397758385ba96da48a96f82cf3521f994f3a78b3
already have revision, skipping fetch
# git checkout -q -f -B kisskb 397758385ba96da48a96f82cf3521f994f3a78b3
# git clean -qxdf
# < git log -1
# commit 397758385ba96da48a96f82cf3521f994f3a78b3
# Author: Michael Ellerman <mpe@ellerman.id.au>
# Date:   Tue Jul 10 16:20:56 2018 +1000
# 
#     powerpc/uaccess: Enable get_user(u64, *p) on 32-bit
#     
#     Currently if you build a 32-bit powerpc kernel and use get_user() to
#     load a u64 value it will fail to build with eg:
#     
#       kernel/rseq.o: In function `rseq_get_rseq_cs':
#       kernel/rseq.c:123: undefined reference to `__get_user_bad'
#     
#     This is hitting the check in __get_user_size() that makes sure the
#     size we're copying doesn't exceed the size of the destination:
#     
#       #define __get_user_size(x, ptr, size, retval)
#       do {
#       	retval = 0;
#       	__chk_user_ptr(ptr);
#       	if (size > sizeof(x))
#       		(x) = __get_user_bad();
#     
#     Which doesn't immediately make sense because the size of the
#     destination is u64, but it's not really, because __get_user_check()
#     etc. internally create an unsigned long and copy into that:
#     
#       #define __get_user_check(x, ptr, size)
#       ({
#       	long __gu_err = -EFAULT;
#       	unsigned long  __gu_val = 0;
#     
#     The problem being that on 32-bit unsigned long is not big enough to
#     hold a u64. We can fix this with a trick from hpa in the x86 code, we
#     statically check the type of x and set the type of __gu_val to either
#     unsigned long or unsigned long long.
#     
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/hppa-linux/bin/hppa-linux-gcc --version
# < git log --format=%s --max-count=1 397758385ba96da48a96f82cf3521f994f3a78b3
# < make -s -j 10 ARCH=parisc O=/kisskb/build/powerpc-next_parisc-defconfig_parisc CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/hppa-linux/bin/hppa-linux-  defconfig
# make -s -j 10 ARCH=parisc O=/kisskb/build/powerpc-next_parisc-defconfig_parisc CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/hppa-linux/bin/hppa-linux-  
/kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter.
<stdin>:1335:2: warning: #warning syscall rseq not implemented [-Wcpp]
/kisskb/src/crypto/blkcipher.c: In function 'crypto_blkcipher_report':
/kisskb/src/crypto/blkcipher.c:513:2: warning: 'strncpy' specified bound 64 equals destination size [-Wstringop-truncation]
  strncpy(rblkcipher.geniv, alg->cra_blkcipher.geniv ?: "<default>",
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   sizeof(rblkcipher.geniv));
   ~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/crypto/ablkcipher.c: In function 'crypto_ablkcipher_report':
/kisskb/src/crypto/ablkcipher.c:374:2: warning: 'strncpy' specified bound 64 equals destination size [-Wstringop-truncation]
  strncpy(rblkcipher.geniv, alg->cra_ablkcipher.geniv ?: "<default>",
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   sizeof(rblkcipher.geniv));
   ~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/crypto/ablkcipher.c: In function 'crypto_givcipher_report':
/kisskb/src/crypto/ablkcipher.c:448:2: warning: 'strncpy' specified bound 64 equals destination size [-Wstringop-truncation]
  strncpy(rblkcipher.geniv, alg->cra_ablkcipher.geniv ?: "<built-in>",
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   sizeof(rblkcipher.geniv));
   ~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter.
In function 'kernfs_get_target_path',
    inlined from 'kernfs_getlink.isra.0' at /kisskb/src/fs/kernfs/symlink.c:109:10,
    inlined from 'kernfs_iop_get_link.part.1' at /kisskb/src/fs/kernfs/symlink.c:127:10,
    inlined from 'kernfs_iop_get_link':
/kisskb/src/fs/kernfs/symlink.c:91:3: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation]
   strncpy(s + len, kn->name, slen);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/fs/kernfs/symlink.c: In function 'kernfs_iop_get_link':
/kisskb/src/fs/kernfs/symlink.c:88:14: note: length computed here
   int slen = strlen(kn->name);
              ^~~~~~~~~~~~~~~~
/kisskb/src/fs/ext4/super.c: In function '__save_error_info.isra.5':
/kisskb/src/fs/ext4/super.c:326:2: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
  strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func));
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/fs/ext4/super.c:330:3: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation]
   strncpy(es->s_first_error_func, func,
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    sizeof(es->s_first_error_func));
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In function 'fill_kobj_path',
    inlined from 'kobject_get_path' at /kisskb/src/lib/kobject.c:155:2:
/kisskb/src/lib/kobject.c:128:3: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation]
   strncpy(path + length, kobject_name(parent), cur);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/lib/kobject.c: In function 'kobject_get_path':
/kisskb/src/lib/kobject.c:125:13: note: length computed here
   int cur = strlen(kobject_name(parent));
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
Completed OK
# rm -rf /kisskb/build/powerpc-next_parisc-defconfig_parisc
# Build took: 0:01:19.225582