Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/g…

…it/aegl/linux-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] kexec: Use EFI_LOADER_DATA for ELF core header
  [IA64] permon use-after-free fix
  [IA64] sync compat getdents
  [IA64] always build arch/ia64/lib/xor.o
  [IA64] Remove stack hard limit on ia64
  [IA64] point saved_max_pfn to the max_pfn of the entire system
  Revert "[IA64] swiotlb abstraction (e.g. for Xen)"

arch/ia64/ia32/sys_ia32.c

@@ -1267,6 +1267,10 @@ sys32_getdents (unsigned int fd, struct compat_dirent __user *dirent, unsigned i
 	struct getdents32_callback buf;
 	int error;
 
+	error = -EFAULT;
+	if (!access_ok(VERIFY_WRITE, dirent, count))
+		goto out;
+
 	error = -EBADF;
 	file = fget(fd);
 	if (!file)
@@ -1283,10 +1287,10 @@ sys32_getdents (unsigned int fd, struct compat_dirent __user *dirent, unsigned i
 	error = buf.error;
 	lastdirent = buf.previous;
 	if (lastdirent) {
-		error = -EINVAL;
 		if (put_user(file->f_pos, &lastdirent->d_off))
-			goto out_putf;
-		error = count - buf.count;
+			error = -EFAULT;
+		else
+			error = count - buf.count;
 	}
 
 out_putf:

arch/ia64/kernel/efi.c

@@ -21,6 +21,7 @@
  *	Skip non-WB memory and ignore empty memory ranges.
  */
 #include <linux/module.h>
+#include <linux/bootmem.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/types.h>
@@ -1009,6 +1010,11 @@ efi_memmap_init(unsigned long *s, unsigned long *e)
 		} else
 			ae = efi_md_end(md);
 
+#ifdef CONFIG_CRASH_DUMP
+		/* saved_max_pfn should ignore max_addr= command line arg */
+		if (saved_max_pfn < (ae >> PAGE_SHIFT))
+			saved_max_pfn = (ae >> PAGE_SHIFT);
+#endif
 		/* keep within max_addr= and min_addr= command line arg */
 		as = max(as, min_addr);
 		ae = min(ae, max_addr);
@@ -1177,3 +1183,33 @@ kdump_find_rsvd_region (unsigned long size,
   return ~0UL;
 }
 #endif
+
+#ifdef CONFIG_PROC_VMCORE
+/* locate the size find a the descriptor at a certain address */
+unsigned long
+vmcore_find_descriptor_size (unsigned long address)
+{
+	void *efi_map_start, *efi_map_end, *p;
+	efi_memory_desc_t *md;
+	u64 efi_desc_size;
+	unsigned long ret = 0;
+
+	efi_map_start = __va(ia64_boot_param->efi_memmap);
+	efi_map_end   = efi_map_start + ia64_boot_param->efi_memmap_size;
+	efi_desc_size = ia64_boot_param->efi_memdesc_size;
+
+	for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
+		md = p;
+		if (efi_wb(md) && md->type == EFI_LOADER_DATA
+		    && md->phys_addr == address) {
+			ret = efi_md_size(md);
+			break;
+		}
+	}
+
+	if (ret == 0)
+		printk(KERN_WARNING "Cannot locate EFI vmcore descriptor\n");
+
+	return ret;
+}
+#endif

arch/ia64/kernel/perfmon.c

@@ -2299,7 +2299,7 @@ pfm_remap_buffer(struct vm_area_struct *vma, unsigned long buf, unsigned long ad
  * allocate a sampling buffer and remaps it into the user address space of the task
  */
 static int
-pfm_smpl_buffer_alloc(struct task_struct *task, pfm_context_t *ctx, unsigned long rsize, void **user_vaddr)
+pfm_smpl_buffer_alloc(struct task_struct *task, struct file *filp, pfm_context_t *ctx, unsigned long rsize, void **user_vaddr)
 {
 	struct mm_struct *mm = task->mm;
 	struct vm_area_struct *vma = NULL;
@@ -2349,6 +2349,7 @@ pfm_smpl_buffer_alloc(struct task_struct *task, pfm_context_t *ctx, unsigned lon
 	 * partially initialize the vma for the sampling buffer
 	 */
 	vma->vm_mm	     = mm;
+	vma->vm_file	     = filp;
 	vma->vm_flags	     = VM_READ| VM_MAYREAD |VM_RESERVED;
 	vma->vm_page_prot    = PAGE_READONLY; /* XXX may need to change */
 
@@ -2387,6 +2388,8 @@ pfm_smpl_buffer_alloc(struct task_struct *task, pfm_context_t *ctx, unsigned lon
 		goto error;
 	}
 
+	get_file(filp);
+
 	/*
 	 * now insert the vma in the vm list for the process, must be
 	 * done with mmap lock held
@@ -2464,7 +2467,7 @@ pfarg_is_sane(struct task_struct *task, pfarg_context_t *pfx)
 }
 
 static int
-pfm_setup_buffer_fmt(struct task_struct *task, pfm_context_t *ctx, unsigned int ctx_flags,
+pfm_setup_buffer_fmt(struct task_struct *task, struct file *filp, pfm_context_t *ctx, unsigned int ctx_flags,
 		     unsigned int cpu, pfarg_context_t *arg)
 {
 	pfm_buffer_fmt_t *fmt = NULL;
@@ -2505,7 +2508,7 @@ pfm_setup_buffer_fmt(struct task_struct *task, pfm_context_t *ctx, unsigned int
 		/*
 		 * buffer is always remapped into the caller's address space
 		 */
-		ret = pfm_smpl_buffer_alloc(current, ctx, size, &uaddr);
+		ret = pfm_smpl_buffer_alloc(current, filp, ctx, size, &uaddr);
 		if (ret) goto error;
 
 		/* keep track of user address of buffer */
@@ -2716,7 +2719,7 @@ pfm_context_create(pfm_context_t *ctx, void *arg, int count, struct pt_regs *reg
 	 * does the user want to sample?
 	 */
 	if (pfm_uuid_cmp(req->ctx_smpl_buf_id, pfm_null_uuid)) {
-		ret = pfm_setup_buffer_fmt(current, ctx, ctx_flags, 0, req);
+		ret = pfm_setup_buffer_fmt(current, filp, ctx, ctx_flags, 0, req);
 		if (ret) goto buffer_error;
 	}
 

arch/ia64/kernel/setup.c

@@ -251,6 +251,12 @@ reserve_memory (void)
 	}
 #endif
 
+#ifdef CONFIG_PROC_VMCORE
+	if (reserve_elfcorehdr(&rsvd_region[n].start,
+			       &rsvd_region[n].end) == 0)
+		n++;
+#endif
+
 	efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end);
 	n++;
 
@@ -453,6 +459,30 @@ static int __init parse_elfcorehdr(char *arg)
 	return 0;
 }
 early_param("elfcorehdr", parse_elfcorehdr);
+
+int __init reserve_elfcorehdr(unsigned long *start, unsigned long *end)
+{
+	unsigned long length;
+
+	/* We get the address using the kernel command line,
+	 * but the size is extracted from the EFI tables.
+	 * Both address and size are required for reservation
+	 * to work properly.
+	 */
+
+	if (elfcorehdr_addr >= ELFCORE_ADDR_MAX)
+		return -EINVAL;
+
+	if ((length = vmcore_find_descriptor_size(elfcorehdr_addr)) == 0) {
+		elfcorehdr_addr = ELFCORE_ADDR_MAX;
+		return -EINVAL;
+	}
+
+	*start = (unsigned long)__va(elfcorehdr_addr);
+	*end = *start + length;
+	return 0;
+}
+
 #endif /* CONFIG_PROC_VMCORE */
 
 void __init

arch/ia64/lib/Makefile

@@ -9,12 +9,11 @@ lib-y := __divsi3.o __udivsi3.o __modsi3.o __umodsi3.o			\
 	checksum.o clear_page.o csum_partial_copy.o			\
 	clear_user.o strncpy_from_user.o strlen_user.o strnlen_user.o	\
 	flush.o ip_fast_csum.o do_csum.o				\
-	memset.o strlen.o
+	memset.o strlen.o xor.o
 
 lib-$(CONFIG_ITANIUM)	+= copy_page.o copy_user.o memcpy.o
 lib-$(CONFIG_MCKINLEY)	+= copy_page_mck.o memcpy_mck.o
 lib-$(CONFIG_PERFMON)	+= carta_random.o
-lib-$(CONFIG_MD_RAID456)	+= xor.o
 
 AFLAGS___divdi3.o	=
 AFLAGS___udivdi3.o	= -DUNSIGNED

arch/ia64/mm/contig.c

@@ -197,11 +197,6 @@ find_memory (void)
 
 	find_initrd();
 
-#ifdef CONFIG_CRASH_DUMP
-	/* If we are doing a crash dump, we still need to know the real mem
-	 * size before original memory map is reset. */
-	saved_max_pfn = max_pfn;
-#endif
 }
 
 #ifdef CONFIG_SMP

arch/ia64/mm/discontig.c

@@ -480,12 +480,6 @@ void __init find_memory(void)
 	max_pfn = max_low_pfn;
 
 	find_initrd();
-
-#ifdef CONFIG_CRASH_DUMP
-	/* If we are doing a crash dump, we still need to know the real mem
-	 * size before original memory map is reset. */
-        saved_max_pfn = max_pfn;
-#endif
 }
 
 #ifdef CONFIG_SMP

include/asm-ia64/meminit.h

@@ -17,10 +17,11 @@
  * 	- kernel code & data
  * 	- crash dumping code reserved region
  * 	- Kernel memory map built from EFI memory map
+ * 	- ELF core header
  *
  * More could be added if necessary
  */
-#define IA64_MAX_RSVD_REGIONS 7
+#define IA64_MAX_RSVD_REGIONS 8
 
 struct rsvd_region {
 	unsigned long start;	/* virtual address of beginning of element */
@@ -36,6 +37,9 @@ extern void find_initrd (void);
 extern int filter_rsvd_memory (unsigned long start, unsigned long end, void *arg);
 extern void efi_memmap_init(unsigned long *, unsigned long *);
 
+extern unsigned long vmcore_find_descriptor_size(unsigned long address);
+extern int reserve_elfcorehdr(unsigned long *start, unsigned long *end);
+
 /*
  * For rounding an address to the next IA64_GRANULE_SIZE or order
  */

include/asm-ia64/resource.h

@@ -2,7 +2,6 @@
 #define _ASM_IA64_RESOURCE_H
 
 #include <asm/ustack.h>
-#define _STK_LIM_MAX	DEFAULT_USER_STACK_SIZE
 #include <asm-generic/resource.h>
 
 #endif /* _ASM_IA64_RESOURCE_H */

include/asm-x86_64/swiotlb.h

@@ -44,7 +44,6 @@ extern void swiotlb_init(void);
 extern int swiotlb_force;
 
 #ifdef CONFIG_SWIOTLB
-#define SWIOTLB_ARCH_NEED_ALLOC
 extern int swiotlb;
 #else
 #define swiotlb 0