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[ Upstream commitc2e6df3eaa] pgd_page_vaddr() returns an 'unsigned long' address, causing a warning with the memcpy() call in kasan_init(): arch/arm/mm/kasan_init.c: In function 'kasan_init': include/asm-generic/pgtable-nop4d.h:44:50: error: passing argument 2 of '__memcpy' makes pointer from integer without a cast [-Werror=int-conversion] 44 | #define pgd_page_vaddr(pgd) ((unsigned long)(p4d_pgtable((p4d_t){ pgd }))) | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | | | long unsigned int arch/arm/include/asm/string.h:58:45: note: in definition of macro 'memcpy' 58 | #define memcpy(dst, src, len) __memcpy(dst, src, len) | ^~~ arch/arm/mm/kasan_init.c:229:16: note: in expansion of macro 'pgd_page_vaddr' 229 | pgd_page_vaddr(*pgd_offset_k(KASAN_SHADOW_START)), | ^~~~~~~~~~~~~~ arch/arm/include/asm/string.h:21:47: note: expected 'const void *' but argument is of type 'long unsigned int' 21 | extern void *__memcpy(void *dest, const void *src, __kernel_size_t n); | ~~~~~~~~~~~~^~~ Avoid this by adding an explicit typecast. Link: https://lore.kernel.org/all/CACRpkdb3DMvof3-xdtss0Pc6KM36pJA-iy=WhvtNVnsDpeJ24Q@mail.gmail.com/ Fixes:5615f69bc2("ARM: 9016/2: Initialize the mapping of KASan shadow memory") Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Signed-off-by: Sasha Levin <sashal@kernel.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.