mirror of https://gitee.com/openkylin/linux.git
0077aaaeeb
The da903x driver produces an annoying false-positive warning
when built with clang:
drivers/regulator/da903x.c:395:2: error: division by zero is undefined [-Werror,-Wdivision-by-zero]
DA9030_LDO(13, 2100, 2100, 0, INVAL, 0, 0, RCTL11, 3), /* fixed @2.1V */
^ ~
drivers/regulator/da903x.c:359:2: note: expanded from macro 'DA9030_LDO'
DA903x_LDO(DA9030, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
^ ~~~~
drivers/regulator/da903x.c:320:39: note: expanded from macro 'DA903x_LDO'
.n_voltages = (step) ? ((max - min) / step + 1) : 1, \
^ ~~~~
drivers/regulator/da903x.c:415:2: error: division by zero is undefined [-Werror,-Wdivision-by-zero]
DA9034_LDO(5, 3100, 3100, 0, INVAL, 0, 0, OVER3, 7), /* fixed @3.1V */
^ ~
drivers/regulator/da903x.c:356:2: note: expanded from macro 'DA9034_LDO'
DA903x_LDO(DA9034, _id, min, max, step, vreg, shift, nbits, ereg, ebit)
^ ~~~~
drivers/regulator/da903x.c:320:39: note: expanded from macro 'DA903x_LDO'
.n_voltages = (step) ? ((max - min) / step + 1) : 1, \
^ ~~~~
I already reported this as a bug in clang, but it may take a
while to fix it. As I have not been able to come up with any
reasonable workaround, I would just disable compilation here.
Link: https://bugs.llvm.org/show_bug.cgi?id=38789
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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README
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.