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If CONFIG_DEBUG_SG=y, and CONFIG_MMU=y:
include/linux/scatterlist.h: In function ‘sg_set_buf’:
arch/m68k/include/asm/page_mm.h:174:49: warning: ordered comparison of pointer with null pointer [-Wextra]
174 | #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory)
| ^~
or CONFIG_MMU=n:
include/linux/scatterlist.h: In function ‘sg_set_buf’:
arch/m68k/include/asm/page_no.h:33:50: warning: ordered comparison of pointer with null pointer [-Wextra]
33 | #define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
| ^~
Fix this by doing the comparison in the "unsigned long" instead of the
"void *" domain.
Note that for now this is only seen when compiling btrfs, due to commit
e9aa7c285d ("btrfs: enable W=1 checks for btrfs"), but as people
are doing more W=1 compile testing, it will start to show up elsewhere,
too.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Greg Ungerer <gerg@linux-m68k.org>
Link: https://lore.kernel.org/r/20210305084122.4118826-1-geert@linux-m68k.org
a65a802aad