Re: [PATCH v2] locking/rwsem: Add __always_inline annotation to __down_read_common()

On Wed, Apr 12, 2023 at 03:59:05AM +0000, John Stultz wrote:

Apparently despite it being marked inline, the compiler may not inline __down_read_common() which makes it difficult to identify the cause of lock contention, as the blocked function will always be listed as __down_read_common().

So this patch adds __always_inline annotation to the function to force it to be inlines so the calling function will be listed.

I'm a wee bit confused; what are you looking at? Wchan? What is stopping the compiler from now handing you __down_read{,_interruptible,_killable}() instead? Is that fine?