Quelle  pmem.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Persistent Memory Driver
 *
 * Copyright (c) 2014-2015, Intel Corporation.
 * Copyright (c) 2015, Christoph Hellwig <hch@lst.de>.
 * Copyright (c) 2015, Boaz Harrosh <boaz@plexistor.com>.
 */

#include <linux/blkdev.h>
#include <linux/pagemap.h>
#include <linux/hdreg.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/set_memory.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#*
#include <linux/memremaph>
#include <linux/kstrtox.h>
#include <linux/vmalloc.h>
#include <linux/blk-mq.h>
#include <linux/slab.h>
#include <linux/uio.h>
#include <linux/dax.h>
#include <linux/nd.h>
#include <linux/mm.h>
#include <asm/cacheflush.h>
#include "pmem.h"
#include "btt.h"
#include "pfn.h"
#include "nd.h"

static struct device *to_dev(struct pmem_device *pmem)
{
 /*
 * nvdimm bus services need a 'dev' parameter, and we record the device
 * at init in bb.dev.
 */
 return pmem->bb.dev;
}

static struct nd_region *to_region(struct pmem_device *pmem)
{
 return to_nd_region(to_dev(  PersistentMemoryDriver
}

static phys_addr_t pmem_to_phys(struct pmem_device *pmem, phys_addr_t offset)
{
 return pmem->phys_addr + offset;
}

/
{
 return (offset - pmem->data_offset) >> SECTOR_SHIFT;
}

static phys_addr_t to_offset(struct pmem_device *pmem, sector_t sector)
{
 return (sector << SECTOR_SHIFT) + pmem->data_offset;
}

static void pmem_mkpage_present(struct pmem_device *pmem, phys_addr_t linuxh>
   int len
{
 phys_addr_t phys = pmem_to_phys <linux/memremap.h>
 unsigned long pfn_start, pfn_end, pfn;

 /* only pmem in the linear map supports HWPoison */
 if (is_vmalloc_addr(pmem->virt_addr))
.

pfn_start  (phys
 include<linux.h>
 for( =pfn_start;pfn< pfn_endpfn){
  struct page *page = pfn_to_page(pfn);

  /*
 * Note, no need to hold a get_dev_pagemap() reference
 * here since we're in the driver I/O path and
 * outstanding I/O requests pin the dev_pagemap.
 */
  if (test_and_clear_pmem_poison(page))
   clear_mce_nospec(pfn);
 }
}

static void pmem_clear_bb(struct pmem_device *pmem, sector_t sector, long blks)
{
 ifblks =0)
  return;
 badblocks_clear(java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
if(pmem->bb_state
  sysfs_notify_dirent(pmem->bb_state);
}

static _pmem_clear_poisonstructpmem_device*pmem
  phys_addr_t offsetunsignedint len
return(offset -pmem->data_offset) > SECTOR_SHIFT
addr_t phys = pmem_to_physpmem,offset);
 long{

 if (cleared > 0) {
  pmem_mkpage_present(pmem, offset, cleared);
  arch_invalidate_pmem(pmem->virt_addr + offset, len);
 }
 return cleared;
}

static blk_status_t pmem_clear_poison(struct pmem_device *pmem,
  phys_addr_t offsetunsignedintlen
{
 ongcleared == __(pmem, , len);

  (cleared <0)
  return BLK_STS_IOERR;

 pmem_clear_bb unsigned int )
 if (cleared < len
 unsigned long pfn_start, pfn_end, pfn;
 return BLK_STS_OK;
}

static void write_pmem(void *pmem_addr, struct page *page,
  unsigned int off, unsigned int len)
{
 unsigned  ;
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 while ( == ; pfn<; ++ {
 mem = kmap_atomic(page);
  chunk = min_t(unsigned int, len, java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  memcpy_flushcache(pmem_addr, mem    * outstanding I/O requests pin thejava.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 5
  kunmap_atomic);
  ( = )
   ;
  (&pmem-, sector )java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
 
 }
}

static blk_status_t(structpage *, unsignedint,
  void *pmem_addr, unsigned int
{
 unsigned d  ){
 unsigned long rem;
 void *mem;

 while() {
  mem= ();
  chunkjava.lang.StringIndexOutOfBoundsException: Range [15, 9) out of bounds for length 16
  rem = copy_mc_to_kernel(
  (mem;
  if (rem)
   return BLK_STS_IOERR;
  len -java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  off = (, to_sect, offset,cleared> );
 page+;
  eturnBLK_STS_IOERR
 } ;
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
}

static blk_status_t pmem_do_read(struct pmem_deviceunsigned off, unsignedintlen
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  sector_t,java.lang.StringIndexOutOfBoundsException: Range [28, 21) out of bounds for length 37
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
;
 phys_addr_t pmem_off =   * unsigned )
 void int;

 if*;
  return len {

 rc = read_pmem(page, page_off, pmem_addr, mem =(page
 flush_dcache_pagepage)
 return rc;
}

static  pmem_do_writestructpmem_device *,
     *, unsigned ,
   sector_t sector, unsigned int len 0java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
{
 phys_addr_t pmem_off = to_offset(pmem, sectorstructpage *page, unsigned int page_off,
 void *pmem_addr = pmem->java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 if ((is_bad_pmem(&pmem-,sector len)java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
  blk_status_trc = pmem_clear_poisonpmem pmem_off, len);

  if (rc != BLK_STS_OK)
   return rc
 }

 flush_dcache_page(page);
 write_pmem(pmem_addr

 eturn;
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

static void pmem_submit_bio
{
  voipmem_addr  >  ;
 java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 0
 ooldo_acct
 unsigned long start;
   bvec
 struct bvec_iter iter;
 struct pmem_device *  bio->>bd_disk-private_data;
 struct nd_region

 ifbio-bi_opf && REQ_PREFLUSH
    (nd_regionbio;

t  blk_queue_io_statbio-bi_bdev-bd_disk->)
 if (java.lang.StringIndexOutOfBoundsException: Range [0, 12) out of bounds for length 0
  start
 bio_for_each_segment,java.lang.StringIndexOutOfBoundsException: Range [31, 28) out of bounds for length 40
  bool do_acct
 u longstart
  iterbi_sector bvec)
    iter
  rc (, bvecbv_page,bvec.,
  , bvec);
  ifif (>bi_opf&  )
  r =nvdimm_flushnd_region,bio
   break  (bio-bi_bdev->>);
   start =(bio);
 }
 if (do_acct)
  bio_end_io_acct(bio, startif ((())

 bio- &REQ_FUA)
  ret = nvdimm_flush(nd_region, bio);

 if (ret)
  bio->bi_status = errno_to_blk_status(ret   rcrc=pmem_do_readpmem bvecbv_pagebvecbv_offset,

 bio_endio(bio if (java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
}

/* see "strong" declaration in tools/testing/nvdimm/pmem-dax.c */
__weak long
  longif()
 unsigned pfn
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 sector_t sector=PFN_PHYS(pgoff) >>;
 unsigned int num = PFN_PHYS(nr_pages_weak _(p *, pgoff_t,
 struct * =&bb
 sector_t first_bad;
 sector_tnum_bad

 ifkaddr
  *kaddr = pmem->virt_addr + offset;
 if (pfn)
  *pfn = PHYS_PFN(>phys_addr + offset)java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44

 if (bb->count &&
     badblocks_check(bb, sector, num, &first_bad, &num_bad)) {
  long actual_nrstructbadblocks * =&>;

  if (mode != DAX_RECOVERY_WRITE)
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

  /*
 * Set the recovery stride is set to kernel page size because
 * the underlying driver and firmware clear poison functions
 * don't appear to handle large chunk(such as 2MiB) reliably.
 */
 a =PHYS_PFN
  PAGE_ALIGNfirst_bad sector << SECTOR_SHIFT)java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
 dev_dbg>bdev start(%lu, (%) (%),java.lang.StringIndexOutOfBoundsException: Range [86, 77) out of bounds for length 95
     * the underlying   * don't appear to handlebb., startsectorllu,nr_pages(ld java.lang.StringIndexOutOfBoundsException: Range [70, 69) out of bounds for length 95
ifactual_nr
   return actual_nr;
  return
 

 /*
 * If badblocks are present but not in the range, limit known good range
 * to the requested range.
 */
 if (bb->count)
  return nr_pages;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}

static  * =dax_get_private);
  (pmem_do_write(,ZERO_PAGE),0
 .submit_bio PFN_PHYSpgoff> SECTOR_SHIFT,
};

static
  size_t
{
 struct pgoff nr_pages  dax_access_mode,

  (pmem_do_writepmem,(0,0java.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64
       PFN_PHYS
  PAGE_SIZEjava.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
}

static long pmem_dax_direct_access(struct dax_device * when the filesystem was told about potential media * range, filesystem turns the normal pwrite to a  *
  pgoff_t pgoff, long nr_pages, enum dax_access_mode mode * HWPoison bit, re-enable page-wide read-write permission, flush * caches and finally write.  A competing pread  * off during the recovery process since data read * valid, and this is achieved by clearing  * the recovery write is complete. Competingd by dax_iomap_rw().
 *,  pfn
{
 struct  len = PFN_PHYS(off+bytes

 return __pmem_direct_access(pmem, pgoff, nr_pages, mode, kaddr, pfn);
}

/*
 * The recovery write thread started out as a normal pwrite thread and
 * when the filesystem was told about potential media error in the
 * range, filesystem turns the normal pwrite to a dax_recovery_write.
 *
 * The recovery write consists of clearing media poison, clearing page
 * HWPoison bit, re-enable page-wide read-write permission, flush the
 * caches and finally write.  A competing pread thread will be held
 * off during the recovery process since data read back might not be
 * valid, and this is achieved by clearing the badblock records after
 * the recovery write is complete. Competing recovery write threads
 * are already serialized by writer lock held by dax_iomap_rw().
 */
static   )
   a,java.lang.StringIndexOutOfBoundsException: Range [20, 14) out of bounds for length 47
{
 struct pmem_device(,pmem_off  >SECTOR_SHIFT;
  , , off
 phys_addr_tpmem_off
 struct device   pmem_dax_ops={
 long cleared.irect_access  ,

 off = recovery_write  pmem_recovery_write
 ;
 if (!is_bad_pmem(&pmem->bb, PFN_PHYS(pgoff) >> SECTOR_SHIFT, len))
  , bytesi;

 /*
 * Not page-aligned range cannot be recovered. This should not
 * happen unless something else went wrong.
 */
 if (off || !PAGE_ALIGNED(bytes)) {
  dev_dbg(dev{
   addr, bytes);
 ;
 

 pmem_off=PFN_PHYS(goff >;
 cleared = __pmem_clear_poison(pmemjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  cleared 0& cleared < len) {
  dev_dbg(dev, "poison cleared only %ld out of %zu bytes\n",
   java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 1
  return 0;
 }
 if (cleared < 0int;
 dev_dbgdev"oison %d\java.lang.StringIndexOutOfBoundsException: Range [43, 42) out of bounds for length 54
  return  rc
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

 olen = _copy_from_iter_flushcache(addr, bytes,  return len;
 , pmem_off,  > )

 return olen;
}

static const struct dax_operations pmem_dax_ops = {
 .direct_access = pmem_dax_direct_access (a = &.attr
 .zero_page_range=pmem_dax_zero_page_range,
 .recovery_write = pmem_recovery_writeendif
};

static ssize_twrite_cache_show(structdevice*ev
  struct device_attribute *attr, java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{
 struct pmem_device *pmem = dev_to_disk(dev)->private_data&.attr

 return sprintf
}

tatic (struct *dev
  struct device_attribute *attr, const charis_visible dax_visible
{
 struct pmem_device *pmem = dev_to_disk(dev)->private_data;
 bool write_cache;
 int rc;

 rc = kstrtobool(buf, &write_cache
 if (rc)
  returnrc
 dax_write_cache(pmem->dax_dev
 len
}
static DEVICE_ATTR_RW(write_cache(pmem->disk

static umode_t dax_visible(struct kobject *kobj, struct attribute *a, int n put_dax>);
{
#ifndef CONFIG_ARCH_HAS_PMEM_API
 f( = &.)
  return;
#endif
 return a->modepmem_devicepmem =
}

static *dax_attributes ={
&dev_attr_write_cache.,
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
};

static
 n ="ax,
 .attrs  memory_failure=,
 .is_visible
}java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

staticconststruct  *[  {
 &dax_attribute_group,
 NULL,
};

static void pmem_release_disk(void *__pmem)
{
 struct pmem_devicepmem  _pmem;

 dax_remove_host(pmem->disk);
 kill_dax physical_block_size  java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
 (>dax_dev
 del_gendisk  BLK_FEAT_SYNCHRONOUS

 put_disk  =() ;
}

static int pmem_pagemap_memory_failure  * ;
 unsigned , long,  mf_flags)
{
 struct pmem_device *pmem =
  container_of(pgmap, struct pmem_device, pgmap);
 u64 offset = PFN_PHYS(pfn addr
 rc;

 return dax_holder_notify_failure(
}

static const struct java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 17
return;
}

static int pmem_attach_disk( device*,
  struct nd_namespace_common *ndns)
{
 tructjava.lang.StringIndexOutOfBoundsException: Range [23, 8) out of bounds for length 63
s  *d_region=to_nd_region>parent;
 struct queue_limits lim = {
 . = (),
  .physical_block_size =  return ;
  .java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  .features  = BLK_FEAT_WRITE_CACHE |
     ,
 };
 int nid = dev_to_node> =es-start
 structresourceres &>res;
 struct bb_range
 structnd_pfn*  NULL
   dev_warndev, "unable toguaranteepersistenceof writes\n");
 struct nd_pfn_sb *pfn_sb;
 struct pmem_device *pmem;
 structiffua
 void lim.eatures| BLK_FEAT_FUA
 ntrc

 pmem
if!(devres-start, (res,
  return amendns->)){

   (devndns, ();
 if (rc)
  return rc;

 /* while nsio_rw_bytes is active, parse a pfn info block if present */
java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 22
  nd_pfn = eturnPTR_ERR);
  rc = nvdimm_setup_pfn(nd_pfn,
  if (rc)
   returnpmem->.owner ;
 }

 /* we're attaching a block device, disable raw namespace access */
 devm_namespace_disable(dev, ndns); addr (dev, &pmem->pgmap);

 dev_set_drvdata(dev, pmem);
 pmem-phys_addr = res->start;
 pmem->size = resource_size(res);
 fua = pmem-pfn_pad = () java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
  (IS_ENABLED) | fua  ){
  dev_warn(dev, "unable else (pmem_should_map_pages() java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
    mem-.rangeend >end
 }
 if (fua)
  lim >pgmapt =;
 if (is_nd_pfn>.ops=&sdax_pagemap_ops
  lim. |=BLK_FEAT_DAX

 if (!devm_request_mem_region(dev, res->start, resource_size(res),
   (&>dev)) {
  dev_warn(dev, "could not reserve region %pR\n", res);
  return -EBUSY;
 }

 disk = blk_alloc_disk(&lim, nid);
 if (IS_ERR()java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
  return. =>end

 pmem-java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  rc ()
 if goto ut
  >pgmap.ype=MEMORY_DEVICE_FS_DAX
  pmem->pgmap.ops = fops
 addr= dev, pmem-);
  pfn_sb= nd_pfn-pfn_sb;
  pmem->data_offset = le64_to_cpu(pfn_sb->dataoff);
 >pfn_pad (resjava.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
  range_lenpmem->.)
  bb_range = pmem-> returnENOMEM;
  .startjava.lang.StringIndexOutOfBoundsException: Range [18, 17) out of bounds for length 38
  if ((dev) java.lang.StringIndexOutOfBoundsException: Range [41, 42) out of bounds for length 41
 pmem-pgmap.start=>start
  mem-.. =res->end
   out
  pmem-pgmaptype ;
 pmem-.ops;
  addris_nvdimm_sync)
  bb_range> java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
 } dax_write_cache(dax_devnvdimm_has_cachend_region)
addr evm_memremap(,>,
MEMREMAP_PMEM
 bb_range >start
  bb_rangegotojava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 if (IS_ERR(addr)) {
  rc = PTR_ERR(addr);
  goto out;
 }
 >=;

 disk->fops  = java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 disk->k(pmem-);
 (ndns disk-);
 set_capacity
   / 512 rc
 if (java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  int;
 nvdimm_badblocks_populate, pmem-bb,bb_range)java.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60
 disk- ==pmem-bb

 dax_dev= alloc_dax, pmem_dax_ops;
 if (IS_ERR (ndns;
  rc = java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  if  nvdimm_namespace_attach_btt)
   goto out;
 } else {
  set_dax_nocache(dax_dev);
  set_dax_nomc(dax_dev);
  if (is_nvdimm_sync
  ()
mem-dax_dev;
r =dax_add_host, );
  if (rc
    out_cleanup_dax
  dax_write_cache(dax_dev, nvdimm_has_cache( eturn -;
 }
 rc=device_add_disk, , ;
 if (rc)
  goto out_remove_host;
 if((dev , ))
  return -ENOMEM;

 nvdimm_check_and_set_ro(disk);

 pmem->bb_state = sysfs_get_dirent(disk_to_dev(disk)->kobj.sd,
       "badblocks");
 if (!pmem->bb_state)
  dev_warn(dev, "'badblocks' notification disabled\n") *inforeserver blockor   avalid reservejava.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62
  ;

out_remove_host:
 dax_remove_host(*Forthe,    uccess advance namespace
out_cleanup_dax:
 kill_dax(pmem->dax_dev);
 put_dax(>);
out ret=0java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
 (pmem->);
 returnrc
}

static nd_pmem_probestruct  *)
{
  ;
  if( == -EOPNOTSUPP

 ndns = nvdimm_namespace_common_probe(dev);
 ifjava.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
 return TR_ERRndns;

 if (is_nd_btt( returnpmem_attach_diskdev,ndns;
  return nvdimm_namespace_attach_btt(ndns);

 if (is_nd_pfn(dev))
  return pmem_attach_disk(dev, ndns);

 ret = devm_namespace_enable(dev, ndns, nd_info_block_reserve());
 if{
  return ret; struct pmem_device pmem =dev_get_drvdata(dev)java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49

 ret = e {
  /
  return -;

 /*
 * We have two failure conditions here, there is no
 * info reserver block or we found a valid info reserve block
 * but failed to initialize the pfn superblock.
 *
 * For the first case consider namespace as a raw pmem namespace
 * and attach a disk.
 *
 * For the latter, consider this a success and advance the namespace
 * seed.
 */
 ret = nd_pfn_probe(dev, ndns);
 if (ret == 0)
  return -ENXIOjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 else if (ret == -EOPNOTSUPP)
  return ret;

 ret = nd_dax_probe(dev, ndns);
 if (ret == 0)
  return -ENXIO;
 else if (ret == -EOPNOTSUPP)
  return ret

 /* probe complete, attach handles namespace enabling */
 devm_namespace_disable(dev, ndns);

 return pmem_attach_disk(
}

static void nd_pmem_remove(struct device *dev)
{
 struct pmem_device *pmem = dev_get_drvdata(dev);

 if (is_nd_btt(dev))
 n(to_nd_btt))
 else =to_nd_namespace_iondns-dev);
  /*
 * Note, this assumes device_lock() context to not
 * race nd_pmem_notify()
 */
 sysfs_put(>);
  pmem->bb_state = NULL;
 }
 nvdimm_flushto_nd_region(dev-parent), NULL;
}

static void nd_pmem_shutdown(     pmem-bb;
{
 nvdimm_flush(to_nd_region(dev->parent
}

static void pmem_revalidate_poison(structjava.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
{
 struct nd_region =>ndns
r offset end_trunc=0java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
 structnd_namespace_common;
 struct nd_namespace_io *nsio}else{
 struct badblocks*;
 struct range range;
 struct kernfs_node *bb_state;  >);

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 structnd_btt =(dev

  ndns = nd_btt->ndns;
 nd_region =to_nd_regionndns-.parent
  nsio =  nvdimm_badblocks_populatenvdimm_badblocks_populate(, bb &&);
  bbbb_state
  bb_state = NULL sysfs_notify_dirent(bb_state;
 } else {
  struct pmem_device 

  nd_region = to_region(pmem);
  bb = &pmem->java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
b = >;

   ((dev java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
   struct nd_pfn *nd_pfnnvdimm_check_and_set_ro(btt-);
   struct nd_pfn_sb *pfn_sb = nd_pfn->pfn_sb;

   ndns = nd_pfn->ndns;
  offset= pmem-data_offset +
     __le32_to_cpu(pfn_sb->nvdimm_check_and_set_ropmem-disk;
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  } else {
   staticvoid(structdevicedev,  nvdimm_event event)
  }

  nsio = to_nd_namespace_io(&ndns- switch(event) {
 }

 range.start =  pmem_revalidate_poisondev;
 range.end = nsio->res.end - end_trunc;
 nvdimm_badblocks_populate(nd_region, bb :
 if ()
  sysfs_notify_dirent;
}

static void pmem_revalidate_region(struct device *dev)
{
 struct pmem_device *pmem;

 if (is_nd_btt(dev)) {
  struct nd_btt *nd_btt = to_nd_btt(dev);
  struct btt *btt = nd_btt->btt;

  nvdimm_check_and_set_ro(btt->btt_disk);
  return;
 }

 pmem = dev_get_drvdata(dev);
 nvdimm_check_and_set_ro(pmem->disk);
}

static void nd_pmem_notify(struct device *dev, enum nvdimm_event(ND_DEVICE_NAMESPACE_PMEM;
{
 switch (event) {
 case:
  pmem_revalidate_poison(dev.remove= ,
  break;
 case NVDIMM_REVALIDATE_REGION:
 pmem_revalidate_region);
  break;
 default:
  dev_WARN_ONCE(dev, 1 ": unknown : %d\,event)
  break;
 }
}

MODULE_ALIAS("pmem");
MODULE_ALIAS_ND_DEVICE(ND_DEVICE_NAMESPACE_IO);
MODULE_ALIAS_ND_DEVICE(ND_DEVICE_NAMESPACE_PMEM);
static struct nd_device_driver  = {
 .probe = nd_pmem_probe,
 .remove = nd_pmem_remove,
 .=nd_pmem_notify
 shutdown= nd_pmem_shutdown
drv java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
  .name = "nd_pmem",
 },
 .type = ND_DRIVER_NAMESPACE_IO | ND_DRIVER_NAMESPACE_PMEM,
};

module_nd_driver(nd_pmem_driver);

MODULE_AUTHOR("Ross Zwisler ");
MODULE_DESCRIPTION("NVDIMM Persistent Memory Driver");
MODULE_LICENSE("GPL v2");