Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc

Pull sparc updates from David Miller:
 "Some 32-bit kgdb cleanups from Sam Ravnborg, and a hugepage TLB flush
  overhead fix on 64-bit from Nitin Gupta"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: Reduce TLB flushes during hugepte changes
  aeroflex/greth: fix warning about unused variable
  openprom: fix warning
  sparc32: drop superfluous cast in calls to __nocache_pa()
  sparc32: fix build with STRICT_MM_TYPECHECKS
  sparc32: use proper prototype for trapbase
  sparc32: drop local prototype in kgdb_32
  sparc32: drop hardcoding trap_level in kgdb_trap

arch/sparc/include/asm/head_32.h

@@ -43,10 +43,10 @@
 	nop;
 
 #ifdef CONFIG_KGDB
-#define KGDB_TRAP(num) \
-	b kgdb_trap_low; \
-	rd %psr,%l0; \
-	nop; \
+#define KGDB_TRAP(num)                  \
+	mov num, %l7;                   \
+	b kgdb_trap_low;                \
+	rd %psr,%l0;                    \
 	nop;
 #else
 #define KGDB_TRAP(num) \

arch/sparc/include/asm/kgdb.h

@@ -28,10 +28,10 @@ enum regnames {
 #define NUMREGBYTES		((GDB_CSR + 1) * 4)
 #else
 #define NUMREGBYTES		((GDB_Y + 1) * 8)
+#endif
 
 struct pt_regs;
 asmlinkage void kgdb_trap(unsigned long trap_level, struct pt_regs *regs);
-#endif
 
 void arch_kgdb_breakpoint(void);
 

arch/sparc/include/asm/page_32.h

@@ -69,7 +69,6 @@ typedef struct { unsigned long iopgprot; } iopgprot_t;
 
 #define __pte(x)	((pte_t) { (x) } )
 #define __iopte(x)	((iopte_t) { (x) } )
-/* #define __pmd(x)        ((pmd_t) { (x) } ) */ /* XXX procedure with loop */
 #define __pgd(x)	((pgd_t) { (x) } )
 #define __ctxd(x)	((ctxd_t) { (x) } )
 #define __pgprot(x)	((pgprot_t) { (x) } )
@@ -97,7 +96,6 @@ typedef unsigned long iopgprot_t;
 
 #define __pte(x)	(x)
 #define __iopte(x)	(x)
-/* #define __pmd(x)        (x) */ /* XXX later */
 #define __pgd(x)	(x)
 #define __ctxd(x)	(x)
 #define __pgprot(x)	(x)

arch/sparc/include/asm/pgalloc_32.h

@@ -29,9 +29,9 @@ static inline void free_pgd_fast(pgd_t *pgd)
 
 static inline void pgd_set(pgd_t * pgdp, pmd_t * pmdp)
 {
-	unsigned long pa = __nocache_pa((unsigned long)pmdp);
+	unsigned long pa = __nocache_pa(pmdp);
 
-	set_pte((pte_t *)pgdp, (SRMMU_ET_PTD | (pa >> 4)));
+	set_pte((pte_t *)pgdp, __pte((SRMMU_ET_PTD | (pa >> 4))));
 }
 
 #define pgd_populate(MM, PGD, PMD)      pgd_set(PGD, PMD)

arch/sparc/include/asm/pgtable_32.h

@@ -298,7 +298,7 @@ static inline pte_t mk_pte_io(unsigned long page, pgprot_t pgprot, int space)
 #define pgprot_noncached pgprot_noncached
 static inline pgprot_t pgprot_noncached(pgprot_t prot)
 {
-	prot &= ~__pgprot(SRMMU_CACHE);
+	pgprot_val(prot) &= ~pgprot_val(__pgprot(SRMMU_CACHE));
 	return prot;
 }
 

arch/sparc/include/asm/pgtable_64.h

@@ -375,7 +375,7 @@ static inline pgprot_t pgprot_noncached(pgprot_t prot)
 #define pgprot_noncached pgprot_noncached
 
 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
-static inline pte_t pte_mkhuge(pte_t pte)
+static inline unsigned long __pte_huge_mask(void)
 {
 	unsigned long mask;
 
@@ -390,8 +390,19 @@ static inline pte_t pte_mkhuge(pte_t pte)
 	: "=r" (mask)
 	: "i" (_PAGE_SZHUGE_4U), "i" (_PAGE_SZHUGE_4V));
 
-	return __pte(pte_val(pte) | mask);
+	return mask;
 }
+
+static inline pte_t pte_mkhuge(pte_t pte)
+{
+	return __pte(pte_val(pte) | __pte_huge_mask());
+}
+
+static inline bool is_hugetlb_pte(pte_t pte)
+{
+	return !!(pte_val(pte) & __pte_huge_mask());
+}
+
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 static inline pmd_t pmd_mkhuge(pmd_t pmd)
 {
@@ -403,6 +414,11 @@ static inline pmd_t pmd_mkhuge(pmd_t pmd)
 	return __pmd(pte_val(pte));
 }
 #endif
+#else
+static inline bool is_hugetlb_pte(pte_t pte)
+{
+	return false;
+}
 #endif
 
 static inline pte_t pte_mkdirty(pte_t pte)
@@ -856,6 +872,19 @@ static inline unsigned long pud_pfn(pud_t pud)
 void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
 		   pte_t *ptep, pte_t orig, int fullmm);
 
+static void maybe_tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,
+				pte_t *ptep, pte_t orig, int fullmm)
+{
+	/* It is more efficient to let flush_tlb_kernel_range()
+	 * handle init_mm tlb flushes.
+	 *
+	 * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U
+	 *             and SUN4V pte layout, so this inline test is fine.
+	 */
+	if (likely(mm != &init_mm) && pte_accessible(mm, orig))
+		tlb_batch_add(mm, vaddr, ptep, orig, fullmm);
+}
+
 #define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR
 static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
 					    unsigned long addr,
@@ -872,15 +901,7 @@ static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
 	pte_t orig = *ptep;
 
 	*ptep = pte;
-
-	/* It is more efficient to let flush_tlb_kernel_range()
-	 * handle init_mm tlb flushes.
-	 *
-	 * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U
-	 *             and SUN4V pte layout, so this inline test is fine.
-	 */
-	if (likely(mm != &init_mm) && pte_accessible(mm, orig))
-		tlb_batch_add(mm, addr, ptep, orig, fullmm);
+	maybe_tlb_batch_add(mm, addr, ptep, orig, fullmm);
 }
 
 #define set_pte_at(mm,addr,ptep,pte)	\

arch/sparc/include/asm/tlbflush_64.h

@@ -8,6 +8,7 @@
 #define TLB_BATCH_NR	192
 
 struct tlb_batch {
+	bool huge;
 	struct mm_struct *mm;
 	unsigned long tlb_nr;
 	unsigned long active;
@@ -16,7 +17,7 @@ struct tlb_batch {
 
 void flush_tsb_kernel_range(unsigned long start, unsigned long end);
 void flush_tsb_user(struct tlb_batch *tb);
-void flush_tsb_user_page(struct mm_struct *mm, unsigned long vaddr);
+void flush_tsb_user_page(struct mm_struct *mm, unsigned long vaddr, bool huge);
 
 /* TLB flush operations. */