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69114be15b
Place -fcall-used* flags behind cc-option so that clang (which doesn't support them) can still compile the kernel. This is a safe change, the reasoning is as follows: In the (normal) 32-bit ABI, %g5 and %g7 is normally reserved, and in the 64-bit ABI, %g7 is the reserved one. Linux turns them into volatile registers by the way of -fcall-used-*, but on the other hand, omitting the flags shouldn't be harmful; compilers will now simply refuse to touch them, and any assembly code that happens to touch them would still work like usual (because Linux' conventions already treats them as volatile anyway). Signed-off-by: Koakuma <koachan@protonmail.com> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Tested-by: Nathan Chancellor <nathan@kernel.org> Reviewed-by: Andreas Larsson <andreas@gaisler.com> Link: https://lore.kernel.org/r/20241029-sparc-cflags-v3-1-b28745a6bd71@protonmail.com Signed-off-by: Andreas Larsson <andreas@gaisler.com> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.