Merge branch 'topic/acpi' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-pxa2xx

1 files changed, 15 insertions, 3 deletions

diff --git a/arch/tile/include/asm/page.h b/arch/tile/include/asm/page.h
index a213a8d84a95..498a5f71245d 100644
--- a/arch/tile/include/asm/page.h
+++ b/arch/tile/include/asm/page.h
@@ -20,15 +20,17 @@
 #include <arch/chip.h>
 
 /* PAGE_SHIFT and HPAGE_SHIFT determine the page sizes. */
-#if defined(CONFIG_PAGE_SIZE_16KB)
+#if defined(CONFIG_PAGE_SIZE_4KB)  /* tilepro only */
+#define PAGE_SHIFT	12
+#define CTX_PAGE_FLAG	HV_CTX_PG_SM_4K
+#elif defined(CONFIG_PAGE_SIZE_16KB)
 #define PAGE_SHIFT	14
 #define CTX_PAGE_FLAG	HV_CTX_PG_SM_16K
 #elif defined(CONFIG_PAGE_SIZE_64KB)
 #define PAGE_SHIFT	16
 #define CTX_PAGE_FLAG	HV_CTX_PG_SM_64K
 #else
-#define PAGE_SHIFT	HV_LOG2_DEFAULT_PAGE_SIZE_SMALL
-#define CTX_PAGE_FLAG	0
+#error Page size not specified in Kconfig
 #endif
 #define HPAGE_SHIFT	HV_LOG2_DEFAULT_PAGE_SIZE_LARGE
 
@@ -319,6 +321,16 @@ static inline int pfn_valid(unsigned long pfn)
 #define virt_to_page(kaddr) pfn_to_page(kaddr_to_pfn((void *)(kaddr)))
 #define page_to_virt(page) pfn_to_kaddr(page_to_pfn(page))
 
+/*
+ * The kernel text is mapped at MEM_SV_START as read-only.  To allow
+ * modifying kernel text, it is also mapped at PAGE_OFFSET as read-write.
+ * This macro converts a kernel address to its writable kernel text mapping,
+ * which is used to modify the text code on a running kernel by kgdb,
+ * ftrace, kprobe, jump label, etc.
+ */
+#define ktext_writable_addr(kaddr) \
+	((unsigned long)(kaddr) - MEM_SV_START + PAGE_OFFSET)
+
 struct mm_struct;
 extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr);
 extern pte_t *virt_to_kpte(unsigned long kaddr);