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74dd022f9e
When building with -Wunused-but-set-variable, the compiler shouts about a number of pte_unmap() users, since this expands to an empty macro on arm64: | mm/gup.c: In function 'gup_pte_range': | mm/gup.c:1727:16: warning: variable 'ptem' set but not used | [-Wunused-but-set-variable] | mm/gup.c: At top level: | mm/memory.c: In function 'copy_pte_range': | mm/memory.c:821:24: warning: variable 'orig_dst_pte' set but not used | [-Wunused-but-set-variable] | mm/memory.c:821:9: warning: variable 'orig_src_pte' set but not used | [-Wunused-but-set-variable] | mm/swap_state.c: In function 'swap_ra_info': | mm/swap_state.c:641:15: warning: variable 'orig_pte' set but not used | [-Wunused-but-set-variable] | mm/madvise.c: In function 'madvise_free_pte_range': | mm/madvise.c:318:9: warning: variable 'orig_pte' set but not used | [-Wunused-but-set-variable] Rewrite pte_unmap() as a static inline function, which silences the warnings. Signed-off-by: Qian Cai <cai@lca.pw> Signed-off-by: Will Deacon <will.deacon@arm.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 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.