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Commit0cfaee2af3("include/asm-generic/5level-fixup.h: fix variable 'p4d' set but not used") converted a few functions from macros to static inline, which causes parisc to complain, In file included from include/asm-generic/4level-fixup.h:38:0, from arch/parisc/include/asm/pgtable.h:5, from arch/parisc/include/asm/io.h:6, from include/linux/io.h:13, from sound/core/memory.c:9: include/asm-generic/5level-fixup.h:14:18: error: unknown type name 'pgd_t'; did you mean 'pid_t'? #define p4d_t pgd_t ^ include/asm-generic/5level-fixup.h:24:28: note: in expansion of macro 'p4d_t' static inline int p4d_none(p4d_t p4d) ^~~~~ It is because "4level-fixup.h" is included before "asm/page.h" where "pgd_t" is defined. Link: http://lkml.kernel.org/r/20190815205305.1382-1-cai@lca.pw Fixes:0cfaee2af3("include/asm-generic/5level-fixup.h: fix variable 'p4d' set but not used") Signed-off-by: Qian Cai <cai@lca.pw> Reported-by: Guenter Roeck <linux@roeck-us.net> Tested-by: Guenter Roeck <linux@roeck-us.net> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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.