# git rev-parse -q --verify d909f9109c301f4e9e41678025c45d719ab8f7d7^{commit}
d909f9109c301f4e9e41678025c45d719ab8f7d7
already have revision, skipping fetch
# git checkout -q -f -B kisskb d909f9109c301f4e9e41678025c45d719ab8f7d7
# git clean -qxdf
# < git log -1
# commit d909f9109c301f4e9e41678025c45d719ab8f7d7
# Author: Nicholas Piggin <npiggin@gmail.com>
# Date:   Mon Jun 10 13:08:18 2019 +1000
# 
#     powerpc/64s/radix: Enable HAVE_ARCH_HUGE_VMAP
#     
#     This sets the HAVE_ARCH_HUGE_VMAP option, and defines the required
#     page table functions.
#     
#     This enables huge (2MB and 1GB) ioremap mappings. I don't have a
#     benchmark for this change, but huge vmap will be used by a later core
#     kernel change to enable huge vmalloc memory mappings. This improves
#     cached `git diff` performance by about 5% on a 2-node POWER9 with 32MB
#     size dentry cache hash.
#     
#       Profiling git diff dTLB misses with a vanilla kernel:
#     
#       81.75%  git      [kernel.vmlinux]    [k] __d_lookup_rcu
#        7.21%  git      [kernel.vmlinux]    [k] strncpy_from_user
#        1.77%  git      [kernel.vmlinux]    [k] find_get_entry
#        1.59%  git      [kernel.vmlinux]    [k] kmem_cache_free
#     
#                 40,168      dTLB-miss
#            0.100342754 seconds time elapsed
#     
#       With powerpc huge vmalloc:
#     
#                  2,987      dTLB-miss
#            0.095933138 seconds time elapsed
#     
#     Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
#     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
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/hppa-linux/bin/hppa-linux-ld --version
# < git log --format=%s --max-count=1 d909f9109c301f4e9e41678025c45d719ab8f7d7
# < make -s -j 80 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 80 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-  
In file included from /kisskb/src/arch/parisc/math-emu/fcnvxf.c:51:
/kisskb/src/arch/parisc/math-emu/fcnvxf.c: In function 'sgl_to_sgl_fcnvxf':
/kisskb/src/arch/parisc/math-emu/cnv_float.h:63:52: warning: '<<' in boolean context, did you mean '<' ? [-Wint-in-bool-context]
 #define Int_isinexact_to_sgl(int_value) (int_value << 33 - SGL_EXP_LENGTH)
                                         ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/parisc/math-emu/fcnvxf.c:101:6: note: in expansion of macro 'Int_isinexact_to_sgl'
  if (Int_isinexact_to_sgl(src)) {
      ^~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/parisc/math-emu/cnv_float.h:67:21: warning: '<<' in boolean context, did you mean '<' ? [-Wint-in-bool-context]
      if ((int_value << 34 - SGL_EXP_LENGTH) || Slow(sgl_value)) \
          ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/parisc/math-emu/fcnvxf.c:112:5: note: in expansion of macro 'Sgl_roundnearest_from_int'
     Sgl_roundnearest_from_int(src,result);
     ^~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/parisc/math-emu/fcnvxf.c: In function 'dbl_to_sgl_fcnvxf':
/kisskb/src/arch/parisc/math-emu/cnv_float.h:71:27: warning: '<<' in boolean context, did you mean '<' ? [-Wint-in-bool-context]
     ((Dintp1(dint_valueA) << 33 - SGL_EXP_LENGTH) || Dintp2(dint_valueB))
      ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/parisc/math-emu/fcnvxf.c:257:6: note: in expansion of macro 'Dint_isinexact_to_sgl'
  if (Dint_isinexact_to_sgl(srcp1,srcp2)) {
      ^~~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/parisc/math-emu/cnv_float.h:75:31: warning: '<<' in boolean context, did you mean '<' ? [-Wint-in-bool-context]
      if ((Dintp1(dint_valueA) << 34 - SGL_EXP_LENGTH) ||  \
          ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/parisc/math-emu/fcnvxf.c:268:5: note: in expansion of macro 'Sgl_roundnearest_from_dint'
     Sgl_roundnearest_from_dint(srcp1,srcp2,result);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~
Completed OK
# rm -rf /kisskb/build/powerpc-next_parisc-defconfig_parisc
# Build took: 0:01:03.575694