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| author | Jason Gunthorpe <jgg@nvidia.com> | 2024-04-11 19:46:14 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2024-04-22 23:11:19 +0300 |
| commit | 20516d6e51dd9994afda8d556507cfbe7853384b (patch) | |
| tree | 15e4bdf535cbe812c0c232481c3a5cefbb529c4b /include/linux | |
| parent | 1a633bdc8fd9e9e4a9f9a668ae122edfc5aacc86 (diff) | |
| download | linux-20516d6e51dd9994afda8d556507cfbe7853384b.tar.xz | |
x86: Stop using weak symbols for __iowrite32_copy()
Start switching iomap_copy routines over to use #define and arch provided
inline/macro functions instead of weak symbols.
Inline functions allow more compiler optimization and this is often a
driver hot path.
x86 has the only weak implementation for __iowrite32_copy(), so replace it
with a static inline containing the same single instruction inline
assembly. The compiler will generate the "mov edx,ecx" in a more optimal
way.
Remove iomap_copy_64.S
Link: https://lore.kernel.org/r/1-v3-1893cd8b9369+1925-mlx5_arm_wc_jgg@nvidia.com
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/io.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/io.h b/include/linux/io.h index 235ba7d80a8f..ce86120ce9d5 100644 --- a/include/linux/io.h +++ b/include/linux/io.h @@ -16,7 +16,10 @@ struct device; struct resource; -__visible void __iowrite32_copy(void __iomem *to, const void *from, size_t count); +#ifndef __iowrite32_copy +void __iowrite32_copy(void __iomem *to, const void *from, size_t count); +#endif + void __ioread32_copy(void *to, const void __iomem *from, size_t count); void __iowrite64_copy(void __iomem *to, const void *from, size_t count); |