Re: [PATCH] lib: Make _find_next_bit helper function inline

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



I've lost track of what's up and down in this, but now that I look at
this again let me throw in my two observations of stupid gcc behaviour:
For the current code, both debian's gcc (4.7) and 5.1 partially inlines
_find_next_bit, namely the "if (!nbits || start >= nbits)" test. I know it
does it to avoid a function call, but in this case the early return
condition is unlikely, so there's not much to gain. Moreover, it fails
to optimize the test to simply "if (start >= nbits)" - everything being
unsigned, these are obviously equivalent.

Rasmus
--
To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [Linux for Sparc]     [IETF Annouce]     [Security]     [Bugtraq]     [Linux MIPS]     [ECOS]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux