Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "Various fixes and followups"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm, compaction: make sure we isolate a valid PFN
  include/linux/generic-radix-tree.h: fix kerneldoc comment
  kernel/signal.c: trace_signal_deliver when signal_group_exit
  drivers/iommu/intel-iommu.c: fix variable 'iommu' set but not used
  spdxcheck.py: fix directory structures
  kasan: initialize tag to 0xff in __kasan_kmalloc
  z3fold: fix sheduling while atomic
  scripts/gdb: fix invocation when CONFIG_COMMON_CLK is not set
  mm/gup: continue VM_FAULT_RETRY processing even for pre-faults
  ocfs2: fix error path kobject memory leak
  memcg: make it work on sparse non-0-node systems
  mm, memcg: consider subtrees in memory.events
  prctl_set_mm: downgrade mmap_sem to read lock
  prctl_set_mm: refactor checks from validate_prctl_map
  kernel/fork.c: make max_threads symbol static
  arch/arm/boot/compressed/decompress.c: fix build error due to lz4 changes
  arch/parisc/configs/c8000_defconfig: remove obsoleted CONFIG_DEBUG_SLAB_LEAK
  mm/vmalloc.c: fix typo in comment
  lib/sort.c: fix kernel-doc notation warnings
  mm: fix Documentation/vm/hmm.rst Sphinx warnings

scripts/gdb/linux/constants.py.in

@@ -40,7 +40,8 @@
 import gdb
 
 /* linux/clk-provider.h */
-LX_GDBPARSED(CLK_GET_RATE_NOCACHE)
+if IS_BUILTIN(CONFIG_COMMON_CLK):
+    LX_GDBPARSED(CLK_GET_RATE_NOCACHE)
 
 /* linux/fs.h */
 LX_VALUE(SB_RDONLY)

scripts/spdxcheck.py

@@ -32,7 +32,8 @@ class SPDXdata(object):
 def read_spdxdata(repo):
 
     # The subdirectories of LICENSES in the kernel source
-    license_dirs = [ "preferred", "deprecated", "exceptions", "dual" ]
+    # Note: exceptions needs to be parsed as last directory.
+    license_dirs = [ "preferred", "dual", "deprecated", "exceptions" ]
     lictree = repo.head.commit.tree['LICENSES']
 
     spdx = SPDXdata()
@@ -58,13 +59,13 @@ def read_spdxdata(repo):
                 elif l.startswith('SPDX-Licenses:'):
                     for lic in l.split(':')[1].upper().strip().replace(' ', '').replace('\t', '').split(','):
                         if not lic in spdx.licenses:
-                            raise SPDXException(None, 'Exception %s missing license %s' %(ex, lic))
+                            raise SPDXException(None, 'Exception %s missing license %s' %(exception, lic))
                         spdx.exceptions[exception].append(lic)
 
                 elif l.startswith("License-Text:"):
                     if exception:
                         if not len(spdx.exceptions[exception]):
-                            raise SPDXException(el, 'Exception %s is missing SPDX-Licenses' %excid)
+                            raise SPDXException(el, 'Exception %s is missing SPDX-Licenses' %exception)
                         spdx.exception_files += 1
                     else:
                         spdx.license_files += 1