001a30c4d0
On ARMv5 and above, it is beneficial to use compiler built-ins such as __builtin_ffs() and __builtin_ctzl() to implement ffs(), __ffs(), fls() and __fls(). The compiler does inline the clz instruction and even the rbit instruction when available, or provide a constant value when possible. On ARMv4 the compiler calls out to helper functions for those built-ins so it is best to keep the open coded versions in that case. Signed-off-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> |
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| uapi/asm | ||