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

Pull arch/tile updates from Chris Metcalf:
 "Another grab-bag of miscellaneous changes"

* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  tile: use __ro_after_init instead of tile-specific __write_once
  tile: migrate exception table users off module.h and onto extable.h
  tile: remove #pragma unroll from finv_buffer_remote()
  tile-module: Rename jump labels in module_alloc()
  tile-module: Use kmalloc_array() in module_alloc()
  tile/pci_gx: fix spelling mistake: "delievered" -> "delivered"

arch/tile/include/asm/cache.h

@@ -50,18 +50,15 @@
 
 /*
  * Originally we used small TLB pages for kernel data and grouped some
- * things together as "write once", enforcing the property at the end
+ * things together as ro-after-init, enforcing the property at the end
  * of initialization by making those pages read-only and non-coherent.
  * This allowed better cache utilization since cache inclusion did not
  * need to be maintained.  However, to do this requires an extra TLB
  * entry, which on balance is more of a performance hit than the
  * non-coherence is a performance gain, so we now just make "read
- * mostly" and "write once" be synonyms.  We keep the attribute
+ * mostly" and "ro-after-init" be synonyms.  We keep the attribute
  * separate in case we change our minds at a future date.
  */
-#define __write_once __read_mostly
-
-/* __ro_after_init is the generic name for the tile arch __write_once. */
 #define __ro_after_init __read_mostly
 
 #endif /* _ASM_TILE_CACHE_H */

arch/tile/include/asm/sections.h

@@ -19,9 +19,6 @@
 
 #include <asm-generic/sections.h>
 
-/* Write-once data is writable only till the end of initialization. */
-extern char __w1data_begin[], __w1data_end[];
-
 extern char vdso_start[], vdso_end[];
 #ifdef CONFIG_COMPAT
 extern char vdso32_start[], vdso32_end[];

arch/tile/kernel/module.c

@@ -43,29 +43,28 @@ void *module_alloc(unsigned long size)
 	int npages;
 
 	npages = (size + PAGE_SIZE - 1) / PAGE_SIZE;
-	pages = kmalloc(npages * sizeof(struct page *), GFP_KERNEL);
+	pages = kmalloc_array(npages, sizeof(*pages), GFP_KERNEL);
 	if (pages == NULL)
 		return NULL;
 	for (; i < npages; ++i) {
 		pages[i] = alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
 		if (!pages[i])
-			goto error;
+			goto free_pages;
 	}
 
 	area = __get_vm_area(size, VM_ALLOC, MEM_MODULE_START, MEM_MODULE_END);
 	if (!area)
-		goto error;
+		goto free_pages;
 	area->nr_pages = npages;
 	area->pages = pages;
 
 	if (map_vm_area(area, prot_rwx, pages)) {
 		vunmap(area->addr);
-		goto error;
+		goto free_pages;
 	}
 
 	return area->addr;
-
-error:
+ free_pages:
 	while (--i >= 0)
 		__free_page(pages[i]);
 	kfree(pages);

arch/tile/kernel/pci.c

@@ -57,7 +57,7 @@ static int pci_probe = 1;
  * This flag tells if the platform is TILEmpower that needs
  * special configuration for the PLX switch chip.
  */
-int __write_once tile_plx_gen1;
+int __ro_after_init tile_plx_gen1;
 
 static struct pci_controller controllers[TILE_NUM_PCIE];
 static int num_controllers;

arch/tile/kernel/pci_gx.c

@@ -131,7 +131,7 @@ static int tile_irq_cpu(int irq)
 
 	count = cpumask_weight(&intr_cpus_map);
 	if (unlikely(count == 0)) {
-		pr_warn("intr_cpus_map empty, interrupts will be delievered to dataplane tiles\n");
+		pr_warn("intr_cpus_map empty, interrupts will be delivered to dataplane tiles\n");
 		return irq % (smp_height * smp_width);
 	}
 

arch/tile/kernel/setup.c

@@ -49,7 +49,7 @@
 static inline int ABS(int x) { return x >= 0 ? x : -x; }
 
 /* Chip information */
-char chip_model[64] __write_once;
+char chip_model[64] __ro_after_init;
 
 #ifdef CONFIG_VT
 struct screen_info screen_info;
@@ -97,17 +97,17 @@ int node_controller[MAX_NUMNODES] = { [0 ... MAX_NUMNODES-1] = -1 };
 #ifdef CONFIG_HIGHMEM
 /* Map information from VAs to PAs */
 unsigned long pbase_map[1 << (32 - HPAGE_SHIFT)]
-  __write_once __attribute__((aligned(L2_CACHE_BYTES)));
+  __ro_after_init __attribute__((aligned(L2_CACHE_BYTES)));
 EXPORT_SYMBOL(pbase_map);
 
 /* Map information from PAs to VAs */
 void *vbase_map[NR_PA_HIGHBIT_VALUES]
-  __write_once __attribute__((aligned(L2_CACHE_BYTES)));
+  __ro_after_init __attribute__((aligned(L2_CACHE_BYTES)));
 EXPORT_SYMBOL(vbase_map);
 #endif
 
 /* Node number as a function of the high PA bits */
-int highbits_to_node[NR_PA_HIGHBIT_VALUES] __write_once;
+int highbits_to_node[NR_PA_HIGHBIT_VALUES] __ro_after_init;
 EXPORT_SYMBOL(highbits_to_node);
 
 static unsigned int __initdata maxmem_pfn = -1U;
@@ -844,11 +844,11 @@ static void __init zone_sizes_init(void)
 #ifdef CONFIG_NUMA
 
 /* which logical CPUs are on which nodes */
-struct cpumask node_2_cpu_mask[MAX_NUMNODES] __write_once;
+struct cpumask node_2_cpu_mask[MAX_NUMNODES] __ro_after_init;
 EXPORT_SYMBOL(node_2_cpu_mask);
 
 /* which node each logical CPU is on */
-char cpu_2_node[NR_CPUS] __write_once __attribute__((aligned(L2_CACHE_BYTES)));
+char cpu_2_node[NR_CPUS] __ro_after_init __attribute__((aligned(L2_CACHE_BYTES)));
 EXPORT_SYMBOL(cpu_2_node);
 
 /* Return cpu_to_node() except for cpus not yet assigned, which return -1 */
@@ -1269,7 +1269,7 @@ static void __init validate_va(void)
  * cpus plus any other cpus that are willing to share their cache.
  * It is set by hv_inquire_tiles(HV_INQ_TILES_LOTAR).
  */
-struct cpumask __write_once cpu_lotar_map;
+struct cpumask __ro_after_init cpu_lotar_map;
 EXPORT_SYMBOL(cpu_lotar_map);
 
 /*
@@ -1291,7 +1291,7 @@ EXPORT_SYMBOL(hash_for_home_map);
  * cache, those tiles will only appear in cpu_lotar_map, NOT in
  * cpu_cacheable_map, as they are a special case.
  */
-struct cpumask __write_once cpu_cacheable_map;
+struct cpumask __ro_after_init cpu_cacheable_map;
 EXPORT_SYMBOL(cpu_cacheable_map);
 
 static __initdata struct cpumask disabled_map;
@@ -1506,7 +1506,7 @@ void __init setup_arch(char **cmdline_p)
  * Set up per-cpu memory.
  */
 
-unsigned long __per_cpu_offset[NR_CPUS] __write_once;
+unsigned long __per_cpu_offset[NR_CPUS] __ro_after_init;
 EXPORT_SYMBOL(__per_cpu_offset);
 
 static size_t __initdata pfn_offset[MAX_NUMNODES] = { 0 };

arch/tile/kernel/smp.c

@@ -27,7 +27,7 @@
  * We write to width and height with a single store in head_NN.S,
  * so make the variable aligned to "long".
  */
-HV_Topology smp_topology __write_once __aligned(sizeof(long));
+HV_Topology smp_topology __ro_after_init __aligned(sizeof(long));
 EXPORT_SYMBOL(smp_topology);
 
 #if CHIP_HAS_IPI()

arch/tile/kernel/time.c

@@ -37,7 +37,7 @@
  */
 
 /* How many cycles per second we are running at. */
-static cycles_t cycles_per_sec __write_once;
+static cycles_t cycles_per_sec __ro_after_init;
 
 cycles_t get_clock_rate(void)
 {
@@ -68,7 +68,7 @@ EXPORT_SYMBOL(get_cycles);
  */
 #define SCHED_CLOCK_SHIFT 10
 
-static unsigned long sched_clock_mult __write_once;
+static unsigned long sched_clock_mult __ro_after_init;
 
 static cycles_t clocksource_get_cycles(struct clocksource *cs)
 {

arch/tile/kernel/unaligned.c

@@ -22,7 +22,7 @@
 #include <linux/mman.h>
 #include <linux/types.h>
 #include <linux/err.h>
-#include <linux/module.h>
+#include <linux/extable.h>
 #include <linux/compat.h>
 #include <linux/prctl.h>
 #include <asm/cacheflush.h>

arch/tile/lib/cacheflush.c

@@ -138,19 +138,13 @@ finv_buffer_remote(void *buffer, size_t size, int hfh)
 	if ((unsigned long)base < (unsigned long)buffer)
 		base = buffer;
 
-	/*
-	 * Fire all the loads we need.  The MAF only has eight entries
-	 * so we can have at most eight outstanding loads, so we
-	 * unroll by that amount.
-	 */
-#pragma unroll 8
+	/* Fire all the loads we need. */
 	for (; p >= base; p -= step_size)
 		force_load(p);
 
 	/*
 	 * Repeat, but with finv's instead of loads, to get rid of the
 	 * data we just loaded into our own cache and the old home L3.
-	 * No need to unroll since finv's don't target a register.
 	 * The finv's are guaranteed not to actually flush the data in
 	 * the buffer back to their home, since we just read it, so the
 	 * lines are clean in cache; we will only invalidate those lines.

arch/tile/mm/extable.c

@@ -12,7 +12,7 @@
  *   more details.
  */
 
-#include <linux/module.h>
+#include <linux/extable.h>
 #include <linux/spinlock.h>
 #include <linux/uaccess.h>
 

arch/tile/mm/fault.c

@@ -29,7 +29,7 @@
 #include <linux/tty.h>
 #include <linux/vt_kern.h>		/* For unblank_screen() */
 #include <linux/highmem.h>
-#include <linux/module.h>
+#include <linux/extable.h>
 #include <linux/kprobes.h>
 #include <linux/hugetlb.h>
 #include <linux/syscalls.h>

arch/tile/mm/homecache.c

@@ -47,7 +47,7 @@
  * The noallocl2 option suppresses all use of the L2 cache to cache
  * locally from a remote home.
  */
-static int __write_once noallocl2;
+static int __ro_after_init noallocl2;
 static int __init set_noallocl2(char *str)
 {
 	noallocl2 = 1;

arch/tile/mm/init.c

@@ -190,9 +190,9 @@ static void __init page_table_range_init(unsigned long start,
 
 static int __initdata ktext_hash = 1;  /* .text pages */
 static int __initdata kdata_hash = 1;  /* .data and .bss pages */
-int __write_once hash_default = 1;     /* kernel allocator pages */
+int __ro_after_init hash_default = 1;     /* kernel allocator pages */
 EXPORT_SYMBOL(hash_default);
-int __write_once kstack_hash = 1;      /* if no homecaching, use h4h */
+int __ro_after_init kstack_hash = 1;      /* if no homecaching, use h4h */
 
 /*
  * CPUs to use to for striping the pages of kernel data.  If hash-for-home
@@ -203,7 +203,7 @@ int __write_once kstack_hash = 1;      /* if no homecaching, use h4h */
 static __initdata struct cpumask kdata_mask;
 static __initdata int kdata_arg_seen;
 
-int __write_once kdata_huge;       /* if no homecaching, small pages */
+int __ro_after_init kdata_huge;       /* if no homecaching, small pages */
 
 
 /* Combine a generic pgprot_t with cache home to get a cache-aware pgprot. */
@@ -896,8 +896,8 @@ void __init pgtable_cache_init(void)
 		panic("pgtable_cache_init(): Cannot create pgd cache");
 }
 
-static long __write_once initfree = 1;
-static bool __write_once set_initfree_done;
+static long __ro_after_init initfree = 1;
+static bool __ro_after_init set_initfree_done;
 
 /* Select whether to free (1) or mark unusable (0) the __init pages. */
 static int __init set_initfree(char *str)