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| author | James Hogan <james.hogan@imgtec.com> | 2012-11-23 16:13:05 +0000 |
|---|---|---|
| committer | James Hogan <james.hogan@imgtec.com> | 2013-03-02 20:09:14 +0000 |
| commit | c93d03123169357afde2d9b20dfbf9675295668f (patch) | |
| tree | 88f05b0859830c331cfbff0c1908ac701d8e2a06 /include/asm-generic | |
| parent | 19f949f52599ba7c3f67a5897ac6be14bfcb1200 (diff) | |
| download | lwn-c93d03123169357afde2d9b20dfbf9675295668f.tar.gz lwn-c93d03123169357afde2d9b20dfbf9675295668f.zip | |
asm-generic/io.h: check CONFIG_VIRT_TO_BUS
Make asm-generic/io.h check CONFIG_VIRT_TO_BUS before defining
virt_to_bus() and bus_to_virt(), otherwise it's easy to accidentally
have a silently failing incorrect direct mapped definition rather then
no definition at all.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/io.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h index 33bbbae4ddc6..cc76b3ecd206 100644 --- a/include/asm-generic/io.h +++ b/include/asm-generic/io.h @@ -332,6 +332,7 @@ extern void ioport_unmap(void __iomem *p); #define xlate_dev_kmem_ptr(p) p #define xlate_dev_mem_ptr(p) __va(p) +#ifdef CONFIG_VIRT_TO_BUS #ifndef virt_to_bus static inline unsigned long virt_to_bus(volatile void *address) { @@ -343,6 +344,7 @@ static inline void *bus_to_virt(unsigned long address) return (void *) address; } #endif +#endif #ifndef memset_io #define memset_io(a, b, c) memset(__io_virt(a), (b), (c)) |