riscv: mm: define copy_user_page() as copy_page()

Currently, the implementation of copy_user_page() is identical to
copy_page().

Align riscv with other architectures (alpha, arc, arm64, hexagon,
longarch, m68k, openrisc, s390, um, xtensa) and map copy_user_page()
to copy_page() given that their implementation is identical.

In addition to following a common pattern, this centralizes the
implementation. Any changes to the underlying page copy logic (e.g.,
for CHERI) will now automatically propagate to copy_user_page().

Signed-off-by: Florian Schmaus <florian.schmaus@codasip.com>
Link: https://patch.msgid.link/20260113134025.905627-1-florian.schmaus@codasip.com
Signed-off-by: Paul Walmsley <pjw@kernel.org>

diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h
index ffe213ad65a4eef1f9d69d55bb436af830cbc727..3c517bc9eac567dbb16dbe9f1be894656397e18d 100644 (file)
--- a/arch/riscv/include/asm/page.h
+++ b/arch/riscv/include/asm/page.h
@@ -51,8 +51,7 @@ void clear_page(void *page);
 #define copy_page(to, from)                    memcpy((to), (from), PAGE_SIZE)
 
 #define clear_user_page(pgaddr, vaddr, page)   clear_page(pgaddr)
-#define copy_user_page(vto, vfrom, vaddr, topg) \
-                       memcpy((vto), (vfrom), PAGE_SIZE)
+#define copy_user_page(vto, vfrom, vaddr, topg) copy_page(vto, vfrom)
 
 /*
  * Use struct definitions to apply C type checking