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| author | Geert Uytterhoeven <geert@linux-m68k.org> | 2021-03-05 11:41:22 +0300 |
|---|---|---|
| committer | Geert Uytterhoeven <geert@linux-m68k.org> | 2021-03-06 16:15:07 +0300 |
| commit | a65a802aadba072ca7514fc0c301fd7fdc6fc6cb (patch) | |
| tree | 7944bfe1da3d75470bb8602dbf3e9209a1741e46 | |
| parent | a38fd8748464831584a19438cbb3082b5a2dab15 (diff) | |
| download | linux-a65a802aadba072ca7514fc0c301fd7fdc6fc6cb.tar.xz | |
m68k: Fix virt_addr_valid() W=1 compiler warnings
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
e9aa7c285d20a69c ("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
| -rw-r--r-- | arch/m68k/include/asm/page_mm.h | 2 | ||||
| -rw-r--r-- | arch/m68k/include/asm/page_no.h | 4 |
2 files changed, 3 insertions, 3 deletions
diff --git a/arch/m68k/include/asm/page_mm.h b/arch/m68k/include/asm/page_mm.h index 7f5912af2a52..9e8f0cc30a2c 100644 --- a/arch/m68k/include/asm/page_mm.h +++ b/arch/m68k/include/asm/page_mm.h @@ -171,7 +171,7 @@ static inline __attribute_const__ int __virt_to_node_shift(void) #include <asm-generic/memory_model.h> #endif -#define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory) +#define virt_addr_valid(kaddr) ((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory) #define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn)) #endif /* __ASSEMBLY__ */ diff --git a/arch/m68k/include/asm/page_no.h b/arch/m68k/include/asm/page_no.h index 6bbe52025de3..8d0f862ee9d7 100644 --- a/arch/m68k/include/asm/page_no.h +++ b/arch/m68k/include/asm/page_no.h @@ -30,8 +30,8 @@ extern unsigned long memory_end; #define page_to_pfn(page) virt_to_pfn(page_to_virt(page)) #define pfn_valid(pfn) ((pfn) < max_mapnr) -#define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \ - ((void *)(kaddr) < (void *)memory_end)) +#define virt_addr_valid(kaddr) (((unsigned long)(kaddr) >= PAGE_OFFSET) && \ + ((unsigned long)(kaddr) < memory_end)) #endif /* __ASSEMBLY__ */ |