Merge tag v4.15 of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git

To resolve conflicts in:
 drivers/infiniband/hw/mlx5/main.c
 drivers/infiniband/hw/mlx5/qp.c

From patches merged into the -rc cycle. The conflict resolution matches
what linux-next has been carrying.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

1 files changed, 15 insertions, 18 deletions

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 78ca9a8ee454..800de815519c 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -172,14 +172,15 @@ is_prefetch(struct pt_regs *regs, unsigned long error_code, unsigned long addr)
  * 6. T1   : reaches here, sees vma_pkey(vma)=5, when we really
  *	     faulted on a pte with its pkey=4.
  */
-static void fill_sig_info_pkey(int si_code, siginfo_t *info, u32 *pkey)
+static void fill_sig_info_pkey(int si_signo, int si_code, siginfo_t *info,
+		u32 *pkey)
 {
 	/* This is effectively an #ifdef */
 	if (!boot_cpu_has(X86_FEATURE_OSPKE))
 		return;
 
 	/* Fault not from Protection Keys: nothing to do */
-	if (si_code != SEGV_PKUERR)
+	if ((si_code != SEGV_PKUERR) || (si_signo != SIGSEGV))
 		return;
 	/*
 	 * force_sig_info_fault() is called from a number of
@@ -218,7 +219,7 @@ force_sig_info_fault(int si_signo, int si_code, unsigned long address,
 		lsb = PAGE_SHIFT;
 	info.si_addr_lsb = lsb;
 
-	fill_sig_info_pkey(si_code, &info, pkey);
+	fill_sig_info_pkey(si_signo, si_code, &info, pkey);
 
 	force_sig_info(si_signo, &info, tsk);
 }
@@ -438,18 +439,13 @@ static noinline int vmalloc_fault(unsigned long address)
 	if (pgd_none(*pgd_ref))
 		return -1;
 
-	if (pgd_none(*pgd)) {
-		set_pgd(pgd, *pgd_ref);
-		arch_flush_lazy_mmu_mode();
-	} else if (CONFIG_PGTABLE_LEVELS > 4) {
-		/*
-		 * With folded p4d, pgd_none() is always false, so the pgd may
-		 * point to an empty page table entry and pgd_page_vaddr()
-		 * will return garbage.
-		 *
-		 * We will do the correct sanity check on the p4d level.
-		 */
-		BUG_ON(pgd_page_vaddr(*pgd) != pgd_page_vaddr(*pgd_ref));
+	if (CONFIG_PGTABLE_LEVELS > 4) {
+		if (pgd_none(*pgd)) {
+			set_pgd(pgd, *pgd_ref);
+			arch_flush_lazy_mmu_mode();
+		} else {
+			BUG_ON(pgd_page_vaddr(*pgd) != pgd_page_vaddr(*pgd_ref));
+		}
 	}
 
 	/* With 4-level paging, copying happens on the p4d level. */
@@ -458,7 +454,7 @@ static noinline int vmalloc_fault(unsigned long address)
 	if (p4d_none(*p4d_ref))
 		return -1;
 
-	if (p4d_none(*p4d)) {
+	if (p4d_none(*p4d) && CONFIG_PGTABLE_LEVELS == 4) {
 		set_p4d(p4d, *p4d_ref);
 		arch_flush_lazy_mmu_mode();
 	} else {
@@ -469,6 +465,7 @@ static noinline int vmalloc_fault(unsigned long address)
 	 * Below here mismatches are bugs because these lower tables
 	 * are shared:
 	 */
+	BUILD_BUG_ON(CONFIG_PGTABLE_LEVELS < 4);
 
 	pud = pud_offset(p4d, address);
 	pud_ref = pud_offset(p4d_ref, address);
@@ -701,7 +698,7 @@ show_fault_oops(struct pt_regs *regs, unsigned long error_code,
 	else
 		printk(KERN_CONT "paging request");
 
-	printk(KERN_CONT " at %p\n", (void *) address);
+	printk(KERN_CONT " at %px\n", (void *) address);
 	printk(KERN_ALERT "IP: %pS\n", (void *)regs->ip);
 
 	dump_pagetable(address);
@@ -860,7 +857,7 @@ show_signal_msg(struct pt_regs *regs, unsigned long error_code,
 	if (!printk_ratelimit())
 		return;
 
-	printk("%s%s[%d]: segfault at %lx ip %p sp %p error %lx",
+	printk("%s%s[%d]: segfault at %lx ip %px sp %px error %lx",
 		task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG,
 		tsk->comm, task_pid_nr(tsk), address,
 		(void *)regs->ip, (void *)regs->sp, error_code);