diff mbox series

crypto: scatterwalk - Remove obsolete PageSlab check

Message ID 20210624063215.GA31721@gondor.apana.org.au
State New
Headers show
Series crypto: scatterwalk - Remove obsolete PageSlab check | expand

Commit Message

Herbert Xu June 24, 2021, 6:32 a.m. UTC 
On Fri, Jun 18, 2021 at 11:12:58AM -0700, Ira Weiny wrote:
>
> Interesting!  Thanks!
> 
> Digging around a bit more I found:
> 
> https://lore.kernel.org/patchwork/patch/439637/

Nice find.  So we can at least get rid of the PageSlab call from
the Crypto API.

---8<---
As it is now legal to call flush_dcache_page on slab pages we
no longer need to do the check in the Crypto API.

Reported-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff mbox series

Patch

diff --git a/include/crypto/scatterwalk.h b/include/crypto/scatterwalk.h
index c837d0775474..7af08174a721 100644
--- a/include/crypto/scatterwalk.h
+++ b/include/crypto/scatterwalk.h
@@ -81,12 +81,7 @@  static inline void scatterwalk_pagedone(struct scatter_walk *walk, int out,
 		struct page *page;
 
 		page = sg_page(walk->sg) + ((walk->offset - 1) >> PAGE_SHIFT);
-		/* Test ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE first as
-		 * PageSlab cannot be optimised away per se due to
-		 * use of volatile pointer.
-		 */
-		if (ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE && !PageSlab(page))
-			flush_dcache_page(page);
+		flush_dcache_page(page);
 	}
 
 	if (more && walk->offset >= walk->sg->offset + walk->sg->length)