arm64: sync_icache_aliases to take end parameter instead of size

To be consistent with other functions with similar names and
functionality in cacheflush.h, cache.S, and cachetlb.rst, change
to specify the range in terms of start and end, as opposed to
start and size.

No functional change intended.

Reported-by: Will Deacon <[email protected]>
Acked-by: Mark Rutland <[email protected]>
Signed-off-by: Fuad Tabba <[email protected]>
Reviewed-by: Ard Biesheuvel <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Will Deacon <[email protected]>

1 files changed, 10 insertions, 11 deletions

diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c
index 0341bcc6fdf3..c4ca7e05fdb8 100644
--- a/arch/arm64/mm/flush.c
+++ b/arch/arm64/mm/flush.c
@@ -14,28 +14,25 @@
 #include <asm/cache.h>
 #include <asm/tlbflush.h>
 
-void sync_icache_aliases(void *kaddr, unsigned long len)
+void sync_icache_aliases(unsigned long start, unsigned long end)
 {
-	unsigned long addr = (unsigned long)kaddr;
-
 	if (icache_is_aliasing()) {
-		__clean_dcache_area_pou(kaddr, kaddr + len);
+		__clean_dcache_area_pou(start, end);
 		__flush_icache_all();
 	} else {
 		/*
 		 * Don't issue kick_all_cpus_sync() after I-cache invalidation
 		 * for user mappings.
 		 */
-		__flush_icache_range(addr, addr + len);
+		__flush_icache_range(start, end);
 	}
 }
 
-static void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
-				unsigned long uaddr, void *kaddr,
-				unsigned long len)
+static void flush_ptrace_access(struct vm_area_struct *vma, unsigned long start,
+				unsigned long end)
 {
 	if (vma->vm_flags & VM_EXEC)
-		sync_icache_aliases(kaddr, len);
+		sync_icache_aliases(start, end);
 }
 
 /*
@@ -48,7 +45,7 @@ void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
 		       unsigned long len)
 {
 	memcpy(dst, src, len);
-	flush_ptrace_access(vma, page, uaddr, dst, len);
+	flush_ptrace_access(vma, (unsigned long)dst, (unsigned long)dst + len);
 }
 
 void __sync_icache_dcache(pte_t pte)
@@ -56,7 +53,9 @@ void __sync_icache_dcache(pte_t pte)
 	struct page *page = pte_page(pte);
 
 	if (!test_bit(PG_dcache_clean, &page->flags)) {
-		sync_icache_aliases(page_address(page), page_size(page));
+		sync_icache_aliases((unsigned long)page_address(page),
+				    (unsigned long)page_address(page) +
+					    page_size(page));
 		set_bit(PG_dcache_clean, &page->flags);
 	}
 }