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Merge branch 'akpm' (patches from Andrew)

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Merge more updates from Andrew Morton:
 "147 patches, based on 7d2a07b769.

  Subsystems affected by this patch series: mm (memory-hotplug, rmap,
  ioremap, highmem, cleanups, secretmem, kfence, damon, and vmscan),
  alpha, percpu, procfs, misc, core-kernel, MAINTAINERS, lib,
  checkpatch, epoll, init, nilfs2, coredump, fork, pids, criu, kconfig,
  selftests, ipc, and scripts"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (94 commits)
  scripts: check_extable: fix typo in user error message
  mm/workingset: correct kernel-doc notations
  ipc: replace costly bailout check in sysvipc_find_ipc()
  selftests/memfd: remove unused variable
  Kconfig.debug: drop selecting non-existing HARDLOCKUP_DETECTOR_ARCH
  configs: remove the obsolete CONFIG_INPUT_POLLDEV
  prctl: allow to setup brk for et_dyn executables
  pid: cleanup the stale comment mentioning pidmap_init().
  kernel/fork.c: unexport get_{mm,task}_exe_file
  coredump: fix memleak in dump_vma_snapshot()
  fs/coredump.c: log if a core dump is aborted due to changed file permissions
  nilfs2: use refcount_dec_and_lock() to fix potential UAF
  nilfs2: fix memory leak in nilfs_sysfs_delete_snapshot_group
  nilfs2: fix memory leak in nilfs_sysfs_create_snapshot_group
  nilfs2: fix memory leak in nilfs_sysfs_delete_##name##_group
  nilfs2: fix memory leak in nilfs_sysfs_create_##name##_group
  nilfs2: fix NULL pointer in nilfs_##name##_attr_release
  nilfs2: fix memory leak in nilfs_sysfs_create_device_group
  trap: cleanup trap_init()
  init: move usermodehelper_enable() to populate_rootfs()
  ...
This commit is contained in:
Linus Torvalds
2021-09-08 12:55:35 -07:00
parent cc09ee80c3 b285437d1d
commit 2d338201d5
149 changed files with 5357 additions and 946 deletions
Download Patch File Download Diff File Expand all files Collapse all files

53
drivers/dax/kmem.c
View File

@@ -37,15 +37,16 @@ static int dax_kmem_range(struct dev_dax *dev_dax, int i, struct range *r)
struct dax_kmem_data {
const char *res_name;
int mgid;
struct resource *res[];
};
static int dev_dax_kmem_probe(struct dev_dax *dev_dax)
{
struct device *dev = &dev_dax->dev;
unsigned long total_len = 0;
struct dax_kmem_data *data;
int rc = -ENOMEM;
int i, mapped = 0;
int i, rc, mapped = 0;
int numa_node;
/*
@@ -61,16 +62,7 @@ static int dev_dax_kmem_probe(struct dev_dax *dev_dax)
return -EINVAL;
}
data = kzalloc(struct_size(data, res, dev_dax->nr_range), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->res_name = kstrdup(dev_name(dev), GFP_KERNEL);
if (!data->res_name)
goto err_res_name;
for (i = 0; i < dev_dax->nr_range; i++) {
struct resource *res;
struct range range;
rc = dax_kmem_range(dev_dax, i, &range);
@@ -79,6 +71,35 @@ static int dev_dax_kmem_probe(struct dev_dax *dev_dax)
i, range.start, range.end);
continue;
}
total_len += range_len(&range);
}
if (!total_len) {
dev_warn(dev, "rejecting DAX region without any memory after alignment\n");
return -EINVAL;
}
data = kzalloc(struct_size(data, res, dev_dax->nr_range), GFP_KERNEL);
if (!data)
return -ENOMEM;
rc = -ENOMEM;
data->res_name = kstrdup(dev_name(dev), GFP_KERNEL);
if (!data->res_name)
goto err_res_name;
rc = memory_group_register_static(numa_node, total_len);
if (rc < 0)
goto err_reg_mgid;
data->mgid = rc;
for (i = 0; i < dev_dax->nr_range; i++) {
struct resource *res;
struct range range;
rc = dax_kmem_range(dev_dax, i, &range);
if (rc)
continue;
/* Region is permanently reserved if hotremove fails. */
res = request_mem_region(range.start, range_len(&range), data->res_name);
@@ -108,8 +129,8 @@ static int dev_dax_kmem_probe(struct dev_dax *dev_dax)
* Ensure that future kexec'd kernels will not treat
* this as RAM automatically.
*/
rc = add_memory_driver_managed(numa_node, range.start,
range_len(&range), kmem_name, MHP_NONE);
rc = add_memory_driver_managed(data->mgid, range.start,
range_len(&range), kmem_name, MHP_NID_IS_MGID);
if (rc) {
dev_warn(dev, "mapping%d: %#llx-%#llx memory add failed\n",
@@ -129,6 +150,8 @@ static int dev_dax_kmem_probe(struct dev_dax *dev_dax)
return 0;
err_request_mem:
memory_group_unregister(data->mgid);
err_reg_mgid:
kfree(data->res_name);
err_res_name:
kfree(data);
@@ -156,8 +179,7 @@ static void dev_dax_kmem_remove(struct dev_dax *dev_dax)
if (rc)
continue;
rc = remove_memory(dev_dax->target_node, range.start,
range_len(&range));
rc = remove_memory(range.start, range_len(&range));
if (rc == 0) {
release_resource(data->res[i]);
kfree(data->res[i]);
@@ -172,6 +194,7 @@ static void dev_dax_kmem_remove(struct dev_dax *dev_dax)
}
if (success >= dev_dax->nr_range) {
memory_group_unregister(data->mgid);
kfree(data->res_name);
kfree(data);
dev_set_drvdata(dev, NULL);