powerpc/mem: Call flush_coherent_icache() at higher level

flush_coherent_icache() doesn't need the address anymore,
so it can be called immediately when entering the public
functions and doesn't need to be disseminated among
lower level functions.

And use page_to_phys() instead of open coding the calculation
of phys address to call flush_dcache_icache_phys().

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/5f063986e325d2efdd404b8f8c5f4bcbd4eb11a6.1617895813.git.christophe.leroy@csgroup.eu

diff --git a/arch/powerpc/mm/cacheflush.c b/arch/powerpc/mm/cacheflush.c
index dc2d39d..811045c 100644 (file)
--- a/arch/powerpc/mm/cacheflush.c
+++ b/arch/powerpc/mm/cacheflush.c
@@ -143,9 +143,6 @@ static void __flush_dcache_icache(void *p)
 {
        unsigned long addr = (unsigned long)p;
 
-       if (flush_coherent_icache())
-               return;
-
        clean_dcache_range(addr, addr + PAGE_SIZE);
 
        /*
@@ -182,6 +179,8 @@ static void flush_dcache_icache_hugepage(struct page *page)
 
 void flush_dcache_icache_page(struct page *page)
 {
+       if (flush_coherent_icache())
+               return;
 
        if (PageCompound(page))
                return flush_dcache_icache_hugepage(page);
@@ -195,11 +194,7 @@ void flush_dcache_icache_page(struct page *page)
                __flush_dcache_icache(start);
                kunmap_atomic(start);
        } else {
-               unsigned long addr = page_to_pfn(page) << PAGE_SHIFT;
-
-               if (flush_coherent_icache())
-                       return;
-               flush_dcache_icache_phys(addr);
+               flush_dcache_icache_phys(page_to_phys(page));
        }
 #endif
 }