Merge branch 'parisc-4.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Pull parisc update from Helge Deller:
 "This patchset adds Huge Page and HUGETLBFS support for parisc"

Honestly, the hugepage support should have gone through in the merge
window, and is not really an rc-time fix.  But it only touches
arch/parisc, and I cannot find it in myself to care.  If one of the
three parisc users notices a breakage, I will point at Helge and make
rude farting noises.

* 'parisc-4.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Map kernel text and data on huge pages
  parisc: Add Huge Page and HUGETLBFS support
  parisc: Use long branch to do_syscall_trace_exit
  parisc: Increase initial kernel mapping to 32MB on 64bit kernel
  parisc: Initialize the fault vector earlier in the boot process.
  parisc: Add defines for Huge page support
  parisc: Drop unused MADV_xxxK_PAGES flags from asm/mman.h
  parisc: Drop definition of start_thread_som for HP-UX SOM binaries
  parisc: Fix wrong comment regarding first pmd entry flags

1 files changed, 17 insertions, 23 deletions

diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index c5fec4890fdf..1b366c477687 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -409,15 +409,11 @@ static void __init map_pages(unsigned long start_vaddr,
 	unsigned long vaddr;
 	unsigned long ro_start;
 	unsigned long ro_end;
-	unsigned long fv_addr;
-	unsigned long gw_addr;
-	extern const unsigned long fault_vector_20;
-	extern void * const linux_gateway_page;
+	unsigned long kernel_end;
 
 	ro_start = __pa((unsigned long)_text);
 	ro_end   = __pa((unsigned long)&data_start);
-	fv_addr  = __pa((unsigned long)&fault_vector_20) & PAGE_MASK;
-	gw_addr  = __pa((unsigned long)&linux_gateway_page) & PAGE_MASK;
+	kernel_end  = __pa((unsigned long)&_end);
 
 	end_paddr = start_paddr + size;
 
@@ -475,24 +471,25 @@ static void __init map_pages(unsigned long start_vaddr,
 			for (tmp2 = start_pte; tmp2 < PTRS_PER_PTE; tmp2++, pg_table++) {
 				pte_t pte;
 
-				/*
-				 * Map the fault vector writable so we can
-				 * write the HPMC checksum.
-				 */
 				if (force)
 					pte =  __mk_pte(address, pgprot);
-				else if (parisc_text_address(vaddr) &&
-					 address != fv_addr)
+				else if (parisc_text_address(vaddr)) {
 					pte = __mk_pte(address, PAGE_KERNEL_EXEC);
+					if (address >= ro_start && address < kernel_end)
+						pte = pte_mkhuge(pte);
+				}
 				else
 #if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
-				if (address >= ro_start && address < ro_end
-							&& address != fv_addr
-							&& address != gw_addr)
-					pte = __mk_pte(address, PAGE_KERNEL_RO);
-				else
+				if (address >= ro_start && address < ro_end) {
+					pte = __mk_pte(address, PAGE_KERNEL_EXEC);
+					pte = pte_mkhuge(pte);
+				} else
 #endif
+				{
 					pte = __mk_pte(address, pgprot);
+					if (address >= ro_start && address < kernel_end)
+						pte = pte_mkhuge(pte);
+				}
 
 				if (address >= end_paddr) {
 					if (force)
@@ -536,15 +533,12 @@ void free_initmem(void)
 
 	/* force the kernel to see the new TLB entries */
 	__flush_tlb_range(0, init_begin, init_end);
-	/* Attempt to catch anyone trying to execute code here
-	 * by filling the page with BRK insns.
-	 */
-	memset((void *)init_begin, 0x00, init_end - init_begin);
+
 	/* finally dump all the instructions which were cached, since the
 	 * pages are no-longer executable */
 	flush_icache_range(init_begin, init_end);
 	
-	free_initmem_default(-1);
+	free_initmem_default(POISON_FREE_INITMEM);
 
 	/* set up a new led state on systems shipped LED State panel */
 	pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BCOMPLETE);
@@ -728,8 +722,8 @@ static void __init pagetable_init(void)
 		unsigned long size;
 
 		start_paddr = pmem_ranges[range].start_pfn << PAGE_SHIFT;
-		end_paddr = start_paddr + (pmem_ranges[range].pages << PAGE_SHIFT);
 		size = pmem_ranges[range].pages << PAGE_SHIFT;
+		end_paddr = start_paddr + size;
 
 		map_pages((unsigned long)__va(start_paddr), start_paddr,
 			  size, PAGE_KERNEL, 0);