linux-kernel - [PATCH 26/31] m68k: implement flush_icache_user

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Message-Id: <20200510075510.987823-27-hch@lst.de>
Date:   Sun, 10 May 2020 09:55:05 +0200
From:   Christoph Hellwig <hch@....de>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Roman Zippel <zippel@...ux-m68k.org>
Cc:     Jessica Yu <jeyu@...nel.org>, Michal Simek <monstr@...str.eu>,
        x86@...nel.org, linux-alpha@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-c6x-dev@...ux-c6x.org, linux-hexagon@...r.kernel.org,
        linux-ia64@...r.kernel.org, linux-m68k@...ts.linux-m68k.org,
        linux-mips@...r.kernel.org, openrisc@...ts.librecores.org,
        linuxppc-dev@...ts.ozlabs.org, linux-riscv@...ts.infradead.org,
        linux-sh@...r.kernel.org, sparclinux@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-mm@...ck.org,
        linux-um@...ts.infradead.org, linux-xtensa@...ux-xtensa.org,
        linux-fsdevel@...r.kernel.org
Subject: [PATCH 26/31] m68k: implement flush_icache_user_range

Rename the current flush_icache_range to flush_icache_user_range as
per commit ae92ef8a4424 ("PATCH] flush icache in correct context") there
seems to be an assumption that it operates on user addresses.  Add a
flush_icache_range around it that for now is a no-op.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 arch/m68k/include/asm/cacheflush_mm.h | 2 ++
 arch/m68k/mm/cache.c                  | 7 ++++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/m68k/include/asm/cacheflush_mm.h b/arch/m68k/include/asm/cacheflush_mm.h
index 95376bf84faa5..1ac55e7b47f01 100644
--- a/arch/m68k/include/asm/cacheflush_mm.h
+++ b/arch/m68k/include/asm/cacheflush_mm.h
@@ -257,6 +257,8 @@ static inline void __flush_page_to_ram(void *vaddr)
 extern void flush_icache_user_page(struct vm_area_struct *vma, struct page *page,
 				    unsigned long addr, int len);
 extern void flush_icache_range(unsigned long address, unsigned long endaddr);
+extern void flush_icache_user_range(unsigned long address,
+		unsigned long endaddr);
 
 static inline void copy_to_user_page(struct vm_area_struct *vma,
 				     struct page *page, unsigned long vaddr,
diff --git a/arch/m68k/mm/cache.c b/arch/m68k/mm/cache.c
index 99057cd5ff7f1..7915be3a09712 100644
--- a/arch/m68k/mm/cache.c
+++ b/arch/m68k/mm/cache.c
@@ -73,7 +73,7 @@ static unsigned long virt_to_phys_slow(unsigned long vaddr)
 
 /* Push n pages at kernel virtual address and clear the icache */
 /* RZ: use cpush %bc instead of cpush %dc, cinv %ic */
-void flush_icache_range(unsigned long address, unsigned long endaddr)
+void flush_icache_user_range(unsigned long address, unsigned long endaddr)
 {
 	if (CPU_IS_COLDFIRE) {
 		unsigned long start, end;
@@ -104,6 +104,11 @@ void flush_icache_range(unsigned long address, unsigned long endaddr)
 			      : "di" (FLUSH_I));
 	}
 }
+
+void flush_icache_range(unsigned long address, unsigned long endaddr)
+{
+	flush_icache_user_range(address, endaddr);
+}
 EXPORT_SYMBOL(flush_icache_range);
 
 void flush_icache_user_page(struct vm_area_struct *vma, struct page *page,
-- 
2.26.2