Re: [PATCH] mm: fix KASAN build error due to p*d_populate_kernel()

On Thu, Aug 21, 2025 at 07:42:06PM +0900, Harry Yoo wrote:

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Signed-off-by: Harry Yoo harry.yoo@oracle.com

This looks good, other than the nit below re: a comment, I think when we are doing this kind of thing it's necessary to spell out plainly why exactly we're doing it because it's not obvious at first glance.

Good point, will do:

/*

• {pgd,p4d}_populate_kernel() are defined as macros to allow
• compile-time optimization based on the configured page table levels.
• Without this, linking may fail because callers (e.g., KASAN) may rely
• on calls to these functions being optimized away when passing symbols
• that exist only for certain page table levels.

*/

Thanks LGTM!