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authorLinus Torvalds <torvalds@linux-foundation.org>2015-04-14 16:49:17 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-14 16:49:17 -0700
commit1dcf58d6e6e6eb7ec10e9abc56887b040205b06f (patch)
treec03e7a25ef13eea62f1547914a76e5c68f3f4c28 /drivers
parent80dcc31fbe55932ac9204daee5f2ebc0c49b6da3 (diff)
parente4b0db72be2487bae0e3251c22f82c104f7c1cfd (diff)
downloadlinux-1dcf58d6e6e6eb7ec10e9abc56887b040205b06f.tar.bz2
Merge branch 'akpm' (patches from Andrew)
Merge first patchbomb from Andrew Morton: - arch/sh updates - ocfs2 updates - kernel/watchdog feature - about half of mm/ * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (122 commits) Documentation: update arch list in the 'memtest' entry Kconfig: memtest: update number of test patterns up to 17 arm: add support for memtest arm64: add support for memtest memtest: use phys_addr_t for physical addresses mm: move memtest under mm mm, hugetlb: abort __get_user_pages if current has been oom killed mm, mempool: do not allow atomic resizing memcg: print cgroup information when system panics due to panic_on_oom mm: numa: remove migrate_ratelimited mm: fold arch_randomize_brk into ARCH_HAS_ELF_RANDOMIZE mm: split ET_DYN ASLR from mmap ASLR s390: redefine randomize_et_dyn for ELF_ET_DYN_BASE mm: expose arch_mmap_rnd when available s390: standardize mmap_rnd() usage powerpc: standardize mmap_rnd() usage mips: extract logic for mmap_rnd() arm64: standardize mmap_rnd() usage x86: standardize mmap_rnd() usage arm: factor out mmap ASLR into mmap_rnd ...
Diffstat (limited to 'drivers')
-rw-r--r--drivers/base/memory.c21
-rw-r--r--drivers/s390/scsi/zfcp_erp.c4
-rw-r--r--drivers/staging/lustre/lustre/include/linux/lustre_patchless_compat.h4
-rw-r--r--drivers/xen/tmem.c16
4 files changed, 27 insertions, 18 deletions
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index af9c911cd6b5..2804aed3f416 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -219,6 +219,7 @@ static bool pages_correctly_reserved(unsigned long start_pfn)
/*
* MEMORY_HOTPLUG depends on SPARSEMEM in mm/Kconfig, so it is
* OK to have direct references to sparsemem variables in here.
+ * Must already be protected by mem_hotplug_begin().
*/
static int
memory_block_action(unsigned long phys_index, unsigned long action, int online_type)
@@ -228,7 +229,7 @@ memory_block_action(unsigned long phys_index, unsigned long action, int online_t
struct page *first_page;
int ret;
- start_pfn = phys_index << PFN_SECTION_SHIFT;
+ start_pfn = section_nr_to_pfn(phys_index);
first_page = pfn_to_page(start_pfn);
switch (action) {
@@ -286,6 +287,7 @@ static int memory_subsys_online(struct device *dev)
if (mem->online_type < 0)
mem->online_type = MMOP_ONLINE_KEEP;
+ /* Already under protection of mem_hotplug_begin() */
ret = memory_block_change_state(mem, MEM_ONLINE, MEM_OFFLINE);
/* clear online_type */
@@ -328,17 +330,19 @@ store_mem_state(struct device *dev,
goto err;
}
+ /*
+ * Memory hotplug needs to hold mem_hotplug_begin() for probe to find
+ * the correct memory block to online before doing device_online(dev),
+ * which will take dev->mutex. Take the lock early to prevent an
+ * inversion, memory_subsys_online() callbacks will be implemented by
+ * assuming it's already protected.
+ */
+ mem_hotplug_begin();
+
switch (online_type) {
case MMOP_ONLINE_KERNEL:
case MMOP_ONLINE_MOVABLE:
case MMOP_ONLINE_KEEP:
- /*
- * mem->online_type is not protected so there can be a
- * race here. However, when racing online, the first
- * will succeed and the second will just return as the
- * block will already be online. The online type
- * could be either one, but that is expected.
- */
mem->online_type = online_type;
ret = device_online(&mem->dev);
break;
@@ -349,6 +353,7 @@ store_mem_state(struct device *dev,
ret = -EINVAL; /* should never happen */
}
+ mem_hotplug_done();
err:
unlock_device_hotplug();
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index 2c5d4567d1da..acde3f5d6e9e 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -738,11 +738,11 @@ static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *act)
return ZFCP_ERP_FAILED;
if (mempool_resize(act->adapter->pool.sr_data,
- act->adapter->stat_read_buf_num, GFP_KERNEL))
+ act->adapter->stat_read_buf_num))
return ZFCP_ERP_FAILED;
if (mempool_resize(act->adapter->pool.status_read_req,
- act->adapter->stat_read_buf_num, GFP_KERNEL))
+ act->adapter->stat_read_buf_num))
return ZFCP_ERP_FAILED;
atomic_set(&act->adapter->stat_miss, act->adapter->stat_read_buf_num);
diff --git a/drivers/staging/lustre/lustre/include/linux/lustre_patchless_compat.h b/drivers/staging/lustre/lustre/include/linux/lustre_patchless_compat.h
index a260e99a4447..d72605864b0a 100644
--- a/drivers/staging/lustre/lustre/include/linux/lustre_patchless_compat.h
+++ b/drivers/staging/lustre/lustre/include/linux/lustre_patchless_compat.h
@@ -55,7 +55,9 @@ truncate_complete_page(struct address_space *mapping, struct page *page)
if (PagePrivate(page))
page->mapping->a_ops->invalidatepage(page, 0, PAGE_CACHE_SIZE);
- cancel_dirty_page(page, PAGE_SIZE);
+ if (TestClearPageDirty(page))
+ account_page_cleaned(page, mapping);
+
ClearPageMappedToDisk(page);
ll_delete_from_page_cache(page);
}
diff --git a/drivers/xen/tmem.c b/drivers/xen/tmem.c
index 8a65423bc696..c4211a31612d 100644
--- a/drivers/xen/tmem.c
+++ b/drivers/xen/tmem.c
@@ -397,13 +397,15 @@ static int __init xen_tmem_init(void)
#ifdef CONFIG_CLEANCACHE
BUG_ON(sizeof(struct cleancache_filekey) != sizeof(struct tmem_oid));
if (tmem_enabled && cleancache) {
- char *s = "";
- struct cleancache_ops *old_ops =
- cleancache_register_ops(&tmem_cleancache_ops);
- if (old_ops)
- s = " (WARNING: cleancache_ops overridden)";
- pr_info("cleancache enabled, RAM provided by Xen Transcendent Memory%s\n",
- s);
+ int err;
+
+ err = cleancache_register_ops(&tmem_cleancache_ops);
+ if (err)
+ pr_warn("xen-tmem: failed to enable cleancache: %d\n",
+ err);
+ else
+ pr_info("cleancache enabled, RAM provided by "
+ "Xen Transcendent Memory\n");
}
#endif
#ifdef CONFIG_XEN_SELFBALLOONING