[dpdk-dev] [PATCH v6 07/17] drivers: replace page size definitions with function

[Thomas Monjalon]

01/03/2021 10:41, Bruce Richardson:
> On Sun, Feb 28, 2021 at 01:53:42PM +0100, Thomas Monjalon wrote:
> > The page size is often retrieved from the macro PAGE_SIZE.
> > If PAGE_SIZE is not defined, it is either using hard coded default,
> > or getting the system value from the UNIX-only function sysconf().
> > 
> > Such definitions are replaced with the generic function
> > rte_mem_page_size() defined for each supported OS.
> > 
> > Removing PAGE_SIZE definitions will fix dlb drivers for musl libc,
> > because #ifdef checks were missing, causing redefinition errors.
> > 
> > Signed-off-by: Thomas Monjalon <thomas at monjalon.net>
> > ---
> Is the header file with the rte_mem_page_size() function missing from this
> patch?

No, the function exists since DPDK 20.08.

> Also, rather than a function for this, would it not be better to keep it as
> a macro as RTE_PAGE_SIZE, to keep it more in line with the macro people
> expect to have available?

No because the size is not always known at compilation time.
See the implementation:
	https://git.dpdk.org/dpdk/commit/?id=c4b89ecb64eae