cns3xxx: remove linux 4.4 support

[openwrt/staging/lynxis/omap.git] / target / linux / cns3xxx / patches-4.4 / 010-arm_introduce-dma-fiq-irq-broadcast.patch

diff --git a/target/linux/cns3xxx/patches-4.4/010-arm_introduce-dma-fiq-irq-broadcast.patch b/target/linux/cns3xxx/patches-4.4/010-arm_introduce-dma-fiq-irq-broadcast.patch
deleted file mode 100644 (file)
index 024675e..0000000
--- a/target/linux/cns3xxx/patches-4.4/010-arm_introduce-dma-fiq-irq-broadcast.patch
+++ /dev/null
@@ -1,80 +0,0 @@
---- a/arch/arm/include/asm/glue-cache.h
-+++ b/arch/arm/include/asm/glue-cache.h
-@@ -156,9 +156,15 @@ static inline void nop_dma_unmap_area(co
- #define __cpuc_flush_user_range               __glue(_CACHE,_flush_user_cache_range)
- #define __cpuc_coherent_kern_range    __glue(_CACHE,_coherent_kern_range)
- #define __cpuc_coherent_user_range    __glue(_CACHE,_coherent_user_range)
--#define __cpuc_flush_dcache_area      __glue(_CACHE,_flush_kern_dcache_area)
- 
--#define dmac_flush_range              __glue(_CACHE,_dma_flush_range)
-+#ifndef CONFIG_DMA_CACHE_FIQ_BROADCAST
-+# define __cpuc_flush_dcache_area     __glue(_CACHE,_flush_kern_dcache_area)
-+# define dmac_flush_range             __glue(_CACHE,_dma_flush_range)
-+#else
-+# define __cpuc_flush_dcache_area     __glue(fiq,_flush_kern_dcache_area)
-+# define dmac_flush_range             __glue(fiq,_dma_flush_range)
-+#endif
-+
- #endif
- 
- #endif
---- a/arch/arm/mm/Kconfig
-+++ b/arch/arm/mm/Kconfig
-@@ -866,6 +866,17 @@ config DMA_CACHE_RWFO
-         in hardware, other workarounds are needed (e.g. cache
-         maintenance broadcasting in software via FIQ).
- 
-+config DMA_CACHE_FIQ_BROADCAST
-+      bool "Enable fiq broadcast DMA cache maintenance"
-+      depends on CPU_V6K && SMP
-+      select FIQ
-+      help
-+        The Snoop Control Unit on ARM11MPCore does not detect the
-+        cache maintenance operations and the dma_{map,unmap}_area()
-+        functions may leave stale cache entries on other CPUs. By
-+        enabling this option, fiq broadcast in the ARMv6
-+        DMA cache maintenance functions is performed.
-+
- config OUTER_CACHE
-       bool
- 
---- a/arch/arm/mm/flush.c
-+++ b/arch/arm/mm/flush.c
-@@ -319,6 +319,7 @@ void __sync_icache_dcache(pte_t pteval)
- void flush_dcache_page(struct page *page)
- {
-       struct address_space *mapping;
-+      bool skip_broadcast = true;
- 
-       /*
-        * The zero page is never written to, so never has any dirty
-@@ -329,7 +330,10 @@ void flush_dcache_page(struct page *page
- 
-       mapping = page_mapping(page);
- 
--      if (!cache_ops_need_broadcast() &&
-+#ifndef CONFIG_DMA_CACHE_FIQ_BROADCAST
-+      skip_broadcast = !cache_ops_need_broadcast();
-+#endif
-+      if (skip_broadcast &&
-           mapping && !page_mapped(page))
-               clear_bit(PG_dcache_clean, &page->flags);
-       else {
---- a/arch/arm/mm/dma.h
-+++ b/arch/arm/mm/dma.h
-@@ -4,8 +4,13 @@
- #include <asm/glue-cache.h>
- 
- #ifndef MULTI_CACHE
--#define dmac_map_area                 __glue(_CACHE,_dma_map_area)
--#define dmac_unmap_area               __glue(_CACHE,_dma_unmap_area)
-+#ifndef CONFIG_DMA_CACHE_FIQ_BROADCAST
-+# define dmac_map_area                        __glue(_CACHE,_dma_map_area)
-+# define dmac_unmap_area              __glue(_CACHE,_dma_unmap_area)
-+#else
-+# define dmac_map_area                        __glue(fiq,_dma_map_area)
-+# define dmac_unmap_area                      __glue(fiq,_dma_unmap_area)
-+#endif
- 
- /*
-  * These are private to the dma-mapping API.  Do not use directly.