On Thu, Mar 28, 2019 at 01:50:47AM -0400, Valdis Klētnieks wrote:
On Wed, 27 Mar 2019 17:23:05 -0700, Igor Pylypiv said:
and TESTPAGEFLAG defines PageHead: #define TESTPAGEFLAG(uname, lname, policy) \ static __always_inline int Page##uname(struct page *page) (https://elixir.bootlin.com/linux/v5.0.5/source/include/linux/page-flags.h#L2...)
General tip: If you're trying to find where the kernel defines FooBar, and 'git grep FooBar' only finds uses and no definitions, it probably means somebody got over-exuberant with the ## pre-processor operator
'git grep Foo##' usually reveals the culprit. ;)
Thanks for the tip Valdis. I'm going to look more into the ## operator so that I can understand it's use case better. I've used macros before but this one seems a bit strange. :) Jesse Simpson