linux-kernel - [PATCH] xtensa: use asm-generic/cacheflush.h

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Message-Id: <20220816213237.924454-1-dave@stgolabs.net>
Date:   Tue, 16 Aug 2022 14:32:37 -0700
From:   Davidlohr Bueso <dave@...olabs.net>
To:     chris@...kel.net, jcmvbkbc@...il.com
Cc:     linux-xtensa@...ux-xtensa.org, linux-kernel@...r.kernel.org,
        dave@...olabs.net
Subject: [PATCH] xtensa: use asm-generic/cacheflush.h

Rely on asm-generic/cacheflush.h for the defaults
for the non-aliasing cases.

Signed-off-by: Davidlohr Bueso <dave@...olabs.net>
---
 arch/xtensa/include/asm/cacheflush.h | 20 ++------------------
 1 file changed, 2 insertions(+), 18 deletions(-)

diff --git a/arch/xtensa/include/asm/cacheflush.h b/arch/xtensa/include/asm/cacheflush.h
index 7b4359312c25..b86f3fb0bf8d 100644
--- a/arch/xtensa/include/asm/cacheflush.h
+++ b/arch/xtensa/include/asm/cacheflush.h
@@ -129,19 +129,7 @@ void local_flush_cache_page(struct vm_area_struct *vma,
 
 #else
 
-#define flush_cache_all()				do { } while (0)
-#define flush_cache_mm(mm)				do { } while (0)
-#define flush_cache_dup_mm(mm)				do { } while (0)
-
-#define flush_cache_vmap(start,end)			do { } while (0)
-#define flush_cache_vunmap(start,end)			do { } while (0)
-
-#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
-#define flush_dcache_page(page)				do { } while (0)
-
 #define flush_icache_range local_flush_icache_range
-#define flush_cache_page(vma, addr, pfn)		do { } while (0)
-#define flush_cache_range(vma, start, end)		do { } while (0)
 
 #endif
 
@@ -154,12 +142,6 @@ void local_flush_cache_page(struct vm_area_struct *vma,
 		__invalidate_icache_range(start,(end) - (start));	\
 	} while (0)
 
-/* This is not required, see Documentation/core-api/cachetlb.rst */
-#define	flush_icache_page(vma,page)			do { } while (0)
-
-#define flush_dcache_mmap_lock(mapping)			do { } while (0)
-#define flush_dcache_mmap_unlock(mapping)		do { } while (0)
-
 #if defined(CONFIG_MMU) && (DCACHE_WAY_SIZE > PAGE_SIZE)
 
 extern void copy_to_user_page(struct vm_area_struct*, struct page*,
@@ -181,4 +163,6 @@ extern void copy_from_user_page(struct vm_area_struct*, struct page*,
 
 #endif
 
+#include <asm-generic/cacheflush.h>
+
 #endif /* _XTENSA_CACHEFLUSH_H */
-- 
2.37.2