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docs: Correct subject prefix and update LLVM info 

bpf_devel_QA.rst:152 The subject prefix information is not accurate, it
should be 'PATCH bpf-next v2'

Also update LLVM version info and add information about
‘-DLLVM_TARGETS_TO_BUILD’ to prompt the developer to build the desired
target.

Signed-off-by: Jianlin Lv <Jianlin.Lv@arm.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200821052817.46887-1-Jianlin.Lv@arm.com
This commit is contained in:
Jianlin Lv 2020-08-21 13:28:17 +08:00 committed by Alexei Starovoitov
parent 890f4365e4
commit 4d0d167341
1 changed files with 12 additions and 7 deletions
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19
Documentation/bpf/bpf_devel_QA.rst
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@ -149,7 +149,7 @@ In case the patch or patch series has to be reworked and sent out
again in a second or later revision, it is also required to add a
version number (``v2``, ``v3``, ...) into the subject prefix::
git format-patch --subject-prefix='PATCH net-next v2' start..finish
git format-patch --subject-prefix='PATCH bpf-next v2' start..finish
When changes have been requested to the patch series, always send the
whole patch series again with the feedback incorporated (never send
@ -479,17 +479,18 @@ LLVM's static compiler lists the supported targets through
$ llc --version
LLVM (http://llvm.org/):
LLVM version 6.0.0svn
LLVM version 10.0.0
Optimized build.
Default target: x86_64-unknown-linux-gnu
Host CPU: skylake
Registered Targets:
bpf - BPF (host endian)
bpfeb - BPF (big endian)
bpfel - BPF (little endian)
x86 - 32-bit X86: Pentium-Pro and above
x86-64 - 64-bit X86: EM64T and AMD64
aarch64 - AArch64 (little endian)
bpf - BPF (host endian)
bpfeb - BPF (big endian)
bpfel - BPF (little endian)
x86 - 32-bit X86: Pentium-Pro and above
x86-64 - 64-bit X86: EM64T and AMD64
For developers in order to utilize the latest features added to LLVM's
BPF back end, it is advisable to run the latest LLVM releases. Support
@ -517,6 +518,10 @@ from the git repositories::
The built binaries can then be found in the build/bin/ directory, where
you can point the PATH variable to.
Set ``-DLLVM_TARGETS_TO_BUILD`` equal to the target you wish to build, you
will find a full list of targets within the llvm-project/llvm/lib/Target
directory.
Q: Reporting LLVM BPF issues
----------------------------
Q: Should I notify BPF kernel maintainers about issues in LLVM's BPF code