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authorLinus Torvalds <torvalds@linux-foundation.org>2016-03-18 19:26:54 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-18 19:26:54 -0700
commit814a2bf957739f367cbebfa1b60237387b72d0ee (patch)
tree8d65c38d14beb8d6d2dc5b9d7f8dbe63c7cad31a /arch/powerpc
parent237045fc3c67d44088f767dca5a9fa30815eba62 (diff)
parentf9310b2f9a19b7f16c7b1c1558f8b649b9b933c1 (diff)
Merge branch 'akpm' (patches from Andrew)
Merge second patch-bomb from Andrew Morton: - a couple of hotfixes - the rest of MM - a new timer slack control in procfs - a couple of procfs fixes - a few misc things - some printk tweaks - lib/ updates, notably to radix-tree. - add my and Nick Piggin's old userspace radix-tree test harness to tools/testing/radix-tree/. Matthew said it was a godsend during the radix-tree work he did. - a few code-size improvements, switching to __always_inline where gcc screwed up. - partially implement character sets in sscanf * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (118 commits) sscanf: implement basic character sets lib/bug.c: use common WARN helper param: convert some "on"/"off" users to strtobool lib: add "on"/"off" support to kstrtobool lib: update single-char callers of strtobool() lib: move strtobool() to kstrtobool() include/linux/unaligned: force inlining of byteswap operations include/uapi/linux/byteorder, swab: force inlining of some byteswap operations include/asm-generic/atomic-long.h: force inlining of some atomic_long operations usb: common: convert to use match_string() helper ide: hpt366: convert to use match_string() helper ata: hpt366: convert to use match_string() helper power: ab8500: convert to use match_string() helper power: charger_manager: convert to use match_string() helper drm/edid: convert to use match_string() helper pinctrl: convert to use match_string() helper device property: convert to use match_string() helper lib/string: introduce match_string() helper radix-tree tests: add test for radix_tree_iter_next radix-tree tests: add regression3 test ...
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/Kconfig1
-rw-r--r--arch/powerpc/kernel/rtasd.c9
-rw-r--r--arch/powerpc/kernel/traps.c5
-rw-r--r--arch/powerpc/mm/hash_utils_64.c36
-rw-r--r--arch/powerpc/mm/init_32.c8
-rw-r--r--arch/powerpc/mm/mmu_context_hash64.c3
-rw-r--r--arch/powerpc/mm/pgtable_64.c2
-rw-r--r--arch/powerpc/platforms/512x/mpc512x_shared.c2
-rw-r--r--arch/powerpc/platforms/pseries/hotplug-cpu.c10
9 files changed, 34 insertions, 42 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 832cc461d0af..a030e5ecb10b 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -158,6 +158,7 @@ config PPC
select ARCH_HAS_DEVMEM_IS_ALLOWED
select HAVE_ARCH_SECCOMP_FILTER
select ARCH_HAS_UBSAN_SANITIZE_ALL
+ select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
config GENERIC_CSUM
def_bool CPU_LITTLE_ENDIAN
diff --git a/arch/powerpc/kernel/rtasd.c b/arch/powerpc/kernel/rtasd.c
index 5a2c049c1c61..aa610ce8742f 100644
--- a/arch/powerpc/kernel/rtasd.c
+++ b/arch/powerpc/kernel/rtasd.c
@@ -49,7 +49,7 @@ static unsigned int rtas_error_log_buffer_max;
static unsigned int event_scan;
static unsigned int rtas_event_scan_rate;
-static int full_rtas_msgs = 0;
+static bool full_rtas_msgs;
/* Stop logging to nvram after first fatal error */
static int logging_enabled; /* Until we initialize everything,
@@ -592,11 +592,6 @@ __setup("surveillance=", surveillance_setup);
static int __init rtasmsgs_setup(char *str)
{
- if (strcmp(str, "on") == 0)
- full_rtas_msgs = 1;
- else if (strcmp(str, "off") == 0)
- full_rtas_msgs = 0;
-
- return 1;
+ return (kstrtobool(str, &full_rtas_msgs) == 0);
}
__setup("rtasmsgs=", rtasmsgs_setup);
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index b6becc795bb5..33c47fcc455a 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -203,9 +203,8 @@ static int __kprobes __die(const char *str, struct pt_regs *regs, long err)
#ifdef CONFIG_SMP
printk("SMP NR_CPUS=%d ", NR_CPUS);
#endif
-#ifdef CONFIG_DEBUG_PAGEALLOC
- printk("DEBUG_PAGEALLOC ");
-#endif
+ if (debug_pagealloc_enabled())
+ printk("DEBUG_PAGEALLOC ");
#ifdef CONFIG_NUMA
printk("NUMA ");
#endif
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index ba59d5977f34..1005281be9a6 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -255,8 +255,10 @@ int htab_bolt_mapping(unsigned long vstart, unsigned long vend,
if (ret < 0)
break;
+
#ifdef CONFIG_DEBUG_PAGEALLOC
- if ((paddr >> PAGE_SHIFT) < linear_map_hash_count)
+ if (debug_pagealloc_enabled() &&
+ (paddr >> PAGE_SHIFT) < linear_map_hash_count)
linear_map_hash_slots[paddr >> PAGE_SHIFT] = ret | 0x80;
#endif /* CONFIG_DEBUG_PAGEALLOC */
}
@@ -512,17 +514,17 @@ static void __init htab_init_page_sizes(void)
if (mmu_has_feature(MMU_FTR_16M_PAGE))
memcpy(mmu_psize_defs, mmu_psize_defaults_gp,
sizeof(mmu_psize_defaults_gp));
- found:
-#ifndef CONFIG_DEBUG_PAGEALLOC
- /*
- * Pick a size for the linear mapping. Currently, we only support
- * 16M, 1M and 4K which is the default
- */
- if (mmu_psize_defs[MMU_PAGE_16M].shift)
- mmu_linear_psize = MMU_PAGE_16M;
- else if (mmu_psize_defs[MMU_PAGE_1M].shift)
- mmu_linear_psize = MMU_PAGE_1M;
-#endif /* CONFIG_DEBUG_PAGEALLOC */
+found:
+ if (!debug_pagealloc_enabled()) {
+ /*
+ * Pick a size for the linear mapping. Currently, we only
+ * support 16M, 1M and 4K which is the default
+ */
+ if (mmu_psize_defs[MMU_PAGE_16M].shift)
+ mmu_linear_psize = MMU_PAGE_16M;
+ else if (mmu_psize_defs[MMU_PAGE_1M].shift)
+ mmu_linear_psize = MMU_PAGE_1M;
+ }
#ifdef CONFIG_PPC_64K_PAGES
/*
@@ -721,10 +723,12 @@ static void __init htab_initialize(void)
prot = pgprot_val(PAGE_KERNEL);
#ifdef CONFIG_DEBUG_PAGEALLOC
- linear_map_hash_count = memblock_end_of_DRAM() >> PAGE_SHIFT;
- linear_map_hash_slots = __va(memblock_alloc_base(linear_map_hash_count,
- 1, ppc64_rma_size));
- memset(linear_map_hash_slots, 0, linear_map_hash_count);
+ if (debug_pagealloc_enabled()) {
+ linear_map_hash_count = memblock_end_of_DRAM() >> PAGE_SHIFT;
+ linear_map_hash_slots = __va(memblock_alloc_base(
+ linear_map_hash_count, 1, ppc64_rma_size));
+ memset(linear_map_hash_slots, 0, linear_map_hash_count);
+ }
#endif /* CONFIG_DEBUG_PAGEALLOC */
/* On U3 based machines, we need to reserve the DART area and
diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c
index a10be665b645..c2b771614d4f 100644
--- a/arch/powerpc/mm/init_32.c
+++ b/arch/powerpc/mm/init_32.c
@@ -112,10 +112,10 @@ void __init MMU_setup(void)
if (strstr(boot_command_line, "noltlbs")) {
__map_without_ltlbs = 1;
}
-#ifdef CONFIG_DEBUG_PAGEALLOC
- __map_without_bats = 1;
- __map_without_ltlbs = 1;
-#endif
+ if (debug_pagealloc_enabled()) {
+ __map_without_bats = 1;
+ __map_without_ltlbs = 1;
+ }
}
/*
diff --git a/arch/powerpc/mm/mmu_context_hash64.c b/arch/powerpc/mm/mmu_context_hash64.c
index 4e4efbc2658e..9ca6fe16cb29 100644
--- a/arch/powerpc/mm/mmu_context_hash64.c
+++ b/arch/powerpc/mm/mmu_context_hash64.c
@@ -118,8 +118,7 @@ static void destroy_pagetable_page(struct mm_struct *mm)
/* drop all the pending references */
count = ((unsigned long)pte_frag & ~PAGE_MASK) >> PTE_FRAG_SIZE_SHIFT;
/* We allow PTE_FRAG_NR fragments from a PTE page */
- count = atomic_sub_return(PTE_FRAG_NR - count, &page->_count);
- if (!count) {
+ if (page_ref_sub_and_test(page, PTE_FRAG_NR - count)) {
pgtable_page_dtor(page);
free_hot_cold_page(page, 0);
}
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index cdf2123d46db..d9cc66cbdbb7 100644
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -403,7 +403,7 @@ static pte_t *__alloc_for_cache(struct mm_struct *mm, int kernel)
* count.
*/
if (likely(!mm->context.pte_frag)) {
- atomic_set(&page->_count, PTE_FRAG_NR);
+ set_page_count(page, PTE_FRAG_NR);
mm->context.pte_frag = ret + PTE_FRAG_SIZE;
}
spin_unlock(&mm->page_table_lock);
diff --git a/arch/powerpc/platforms/512x/mpc512x_shared.c b/arch/powerpc/platforms/512x/mpc512x_shared.c
index 711f3d352af7..452da2391153 100644
--- a/arch/powerpc/platforms/512x/mpc512x_shared.c
+++ b/arch/powerpc/platforms/512x/mpc512x_shared.c
@@ -188,7 +188,7 @@ static struct fsl_diu_shared_fb __attribute__ ((__aligned__(8))) diu_shared_fb;
static inline void mpc512x_free_bootmem(struct page *page)
{
BUG_ON(PageTail(page));
- BUG_ON(atomic_read(&page->_count) > 1);
+ BUG_ON(page_ref_count(page) > 1);
free_reserved_page(page);
}
diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index 32274f72fe3f..282837a1d74b 100644
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -47,20 +47,14 @@ static DEFINE_PER_CPU(enum cpu_state_vals, current_state) = CPU_STATE_OFFLINE;
static enum cpu_state_vals default_offline_state = CPU_STATE_OFFLINE;
-static int cede_offline_enabled __read_mostly = 1;
+static bool cede_offline_enabled __read_mostly = true;
/*
* Enable/disable cede_offline when available.
*/
static int __init setup_cede_offline(char *str)
{
- if (!strcmp(str, "off"))
- cede_offline_enabled = 0;
- else if (!strcmp(str, "on"))
- cede_offline_enabled = 1;
- else
- return 0;
- return 1;
+ return (kstrtobool(str, &cede_offline_enabled) == 0);
}
__setup("cede_offline=", setup_cede_offline);