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e0ca9353a8
clang-16 warns about casting function pointers with incompatible
prototypes. The x86 math-emu code does this in a number of places
to call some trivial functions that need no arguments:
arch/x86/math-emu/fpu_etc.c:124:14: error: cast from 'void (*)(void)' to 'FUNC_ST0' \
(aka 'void (*)(struct fpu__reg *, unsigned char)') converts to incompatible function \
type [-Werror,-Wcast-function-type-strict]
124 | fchs, fabs, (FUNC_ST0) FPU_illegal, (FUNC_ST0) FPU_illegal,
| ^~~~~~~~~~~~~~~~~~~~~~
arch/x86/math-emu/fpu_trig.c:1634:19: error: cast from 'void (*)(void)' to 'FUNC_ST0' \
(aka 'void (*)(struct fpu__reg *, unsigned char)') converts to incompatible function \
type [-Werror,-Wcast-function-type-strict]
1634 | fxtract, fprem1, (FUNC_ST0) fdecstp, (FUNC_ST0) fincstp
| ^~~~~~~~~~~~~~~~~~
arch/x86/math-emu/reg_constant.c:112:53: error: cast from 'void (*)(void)' to 'FUNC_RC' \
(aka 'void (*)(int)') converts to incompatible function \
type [-Werror,-Wcast-function-type-strict]
112 | fld1, fldl2t, fldl2e, fldpi, fldlg2, fldln2, fldz, (FUNC_RC) FPU_illegal
Change the fdecstp() and fincstp() functions to actually have the correct
prototypes based on the caller, and add wrappers around FPU_illegal() for
adapting those.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/lkml/20240213095631.454543-1-arnd@kernel.org
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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 ReStructured Text 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.