Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile

* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: (27 commits)
  arch/tile: support newer binutils assembler shift semantics
  arch/tile: fix deadlock bugs in rwlock implementation
  drivers/edac: provide support for tile architecture
  tile on-chip network driver: sync up with latest fixes
  arch/tile: support 4KB page size as well as 64KB
  arch/tile: add some more VMSPLIT options and use consistent naming
  arch/tile: fix some comments and whitespace
  arch/tile: export some additional module symbols
  arch/tile: enhance existing finv_buffer_remote() routine
  arch/tile: fix two bugs in the backtracer code
  arch/tile: use extended assembly to inline __mb_incoherent()
  arch/tile: use a cleaner technique to enable interrupt for cpu_idle()
  arch/tile: sync up with <arch/sim.h> and <arch/sim_def.h> changes
  arch/tile: fix reversed test of strict_strtol() return value
  arch/tile: avoid a simulator warning during bootup
  arch/tile: export <asm/hardwall.h> to userspace
  arch/tile: warn and retry if an IPI is not accepted by the target cpu
  arch/tile: stop disabling INTCTRL_1 interrupts during hypervisor downcalls
  arch/tile: fix __ndelay etc to work better
  arch/tile: bug fix: exec'ed task thought it was still single-stepping
  ...

Fix up trivial conflict in arch/tile/kernel/vmlinux.lds.S (percpu
alignment vs section naming convention fix)

1 files changed, 15 insertions, 19 deletions

diff --git a/arch/tile/mm/init.c b/arch/tile/mm/init.c
index 0b9ce69b0ee5..d6e87fda2fb2 100644
--- a/arch/tile/mm/init.c
+++ b/arch/tile/mm/init.c
@@ -53,22 +53,11 @@
 
 #include "migrate.h"
 
-/*
- * We could set FORCE_MAX_ZONEORDER to "(HPAGE_SHIFT - PAGE_SHIFT + 1)"
- * in the Tile Kconfig, but this generates configure warnings.
- * Do it here and force people to get it right to compile this file.
- * The problem is that with 4KB small pages and 16MB huge pages,
- * the default value doesn't allow us to group enough small pages
- * together to make up a huge page.
- */
-#if CONFIG_FORCE_MAX_ZONEORDER < HPAGE_SHIFT - PAGE_SHIFT + 1
-# error "Change FORCE_MAX_ZONEORDER in arch/tile/Kconfig to match page size"
-#endif
-
 #define clear_pgd(pmdptr) (*(pmdptr) = hv_pte(0))
 
 #ifndef __tilegx__
 unsigned long VMALLOC_RESERVE = CONFIG_VMALLOC_RESERVE;
+EXPORT_SYMBOL(VMALLOC_RESERVE);
 #endif
 
 DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
@@ -445,7 +434,7 @@ static pmd_t *__init get_pmd(pgd_t pgtables[], unsigned long va)
 
 /* Temporary page table we use for staging. */
 static pgd_t pgtables[PTRS_PER_PGD]
- __attribute__((section(".init.page")));
+ __attribute__((aligned(HV_PAGE_TABLE_ALIGN)));
 
 /*
  * This maps the physical memory to kernel virtual address space, a total
@@ -653,6 +642,17 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base)
         memcpy(pgd_base, pgtables, sizeof(pgtables));
         __install_page_table(pgd_base, __get_cpu_var(current_asid),
                              swapper_pgprot);
+
+        /*
+         * We just read swapper_pgprot and thus brought it into the cache,
+         * with its new home & caching mode.  When we start the other CPUs,
+         * they're going to reference swapper_pgprot via their initial fake
+         * VA-is-PA mappings, which cache everything locally.  At that
+         * time, if it's in our cache with a conflicting home, the
+         * simulator's coherence checker will complain.  So, flush it out
+         * of our cache; we're not going to ever use it again anyway.
+         */
+        __insn_finv(&swapper_pgprot);
 }
 
 /*
@@ -950,11 +950,7 @@ struct kmem_cache *pgd_cache;
 
 void __init pgtable_cache_init(void)
 {
-        pgd_cache = kmem_cache_create("pgd",
-                                PTRS_PER_PGD*sizeof(pgd_t),
-                                PTRS_PER_PGD*sizeof(pgd_t),
-                                0,
-                                NULL);
+        pgd_cache = kmem_cache_create("pgd", SIZEOF_PGD, SIZEOF_PGD, 0, NULL);
         if (!pgd_cache)
                 panic("pgtable_cache_init(): Cannot create pgd cache");
 }
@@ -989,7 +985,7 @@ static long __write_once initfree = 1;
 static int __init set_initfree(char *str)
 {
         long val;
-        if (strict_strtol(str, 0, &val)) {
+        if (strict_strtol(str, 0, &val) == 0) {
                 initfree = val;
                 pr_info("initfree: %s free init pages\n",
                         initfree ? "will" : "won't");