Merge tag 'mm-nonmm-stable-2023-02-20-15-29' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:
 "There is no particular theme here - mainly quick hits all over the
  tree.

  Most notable is a set of zlib changes from Mikhail Zaslonko which
  enhances and fixes zlib's use of S390 hardware support: 'lib/zlib: Set
  of s390 DFLTCC related patches for kernel zlib'"

* tag 'mm-nonmm-stable-2023-02-20-15-29' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (55 commits)
  Update CREDITS file entry for Jesper Juhl
  sparc: allow PM configs for sparc32 COMPILE_TEST
  hung_task: print message when hung_task_warnings gets down to zero.
  arch/Kconfig: fix indentation
  scripts/tags.sh: fix the Kconfig tags generation when using latest ctags
  nilfs2: prevent WARNING in nilfs_dat_commit_end()
  lib/zlib: remove redundation assignement of avail_in dfltcc_gdht()
  lib/Kconfig.debug: do not enable DEBUG_PREEMPT by default
  lib/zlib: DFLTCC always switch to software inflate for Z_PACKET_FLUSH option
  lib/zlib: DFLTCC support inflate with small window
  lib/zlib: Split deflate and inflate states for DFLTCC
  lib/zlib: DFLTCC not writing header bits when avail_out == 0
  lib/zlib: fix DFLTCC ignoring flush modes when avail_in == 0
  lib/zlib: fix DFLTCC not flushing EOBS when creating raw streams
  lib/zlib: implement switching between DFLTCC and software
  lib/zlib: adjust offset calculation for dfltcc_state
  nilfs2: replace WARN_ONs for invalid DAT metadata block requests
  scripts/spelling.txt: add "exsits" pattern and fix typo instances
  fs: gracefully handle ->get_block not mapping bh in __mpage_writepage
  cramfs: Kconfig: fix spelling & punctuation
  ...

6 files changed, 279 insertions, 12 deletions

diff --git a/scripts/bloat-o-meter b/scripts/bloat-o-meter
index f9553f60a14a..36303afa9dfc 100755
--- a/scripts/bloat-o-meter
+++ b/scripts/bloat-o-meter
@@ -80,8 +80,7 @@ def calc(oldfile, newfile, format):
         if d<0: shrink, down = shrink+1, down-d
         delta.append((d, name))
 
-    delta.sort()
-    delta.reverse()
+    delta.sort(reverse=True)
     return grow, shrink, add, remove, up, down, delta, old, new, otot, ntot
 
 def print_result(symboltype, symbolformat):
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 78cc595b98ce..bd44d12965c9 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -823,7 +823,9 @@ our %deprecated_apis = (
 	"get_state_synchronize_sched"		=> "get_state_synchronize_rcu",
 	"cond_synchronize_sched"		=> "cond_synchronize_rcu",
 	"kmap"					=> "kmap_local_page",
+	"kunmap"				=> "kunmap_local",
 	"kmap_atomic"				=> "kmap_local_page",
+	"kunmap_atomic"				=> "kunmap_local",
 );
 
 #Create a search pattern for all these strings to speed up a loop below
@@ -3142,21 +3144,33 @@ sub process {
 			if ($sign_off =~ /^co-developed-by:$/i) {
 				if ($email eq $author) {
 					WARN("BAD_SIGN_OFF",
-					      "Co-developed-by: should not be used to attribute nominal patch author '$author'\n" . "$here\n" . $rawline);
+					      "Co-developed-by: should not be used to attribute nominal patch author '$author'\n" . $herecurr);
 				}
 				if (!defined $lines[$linenr]) {
 					WARN("BAD_SIGN_OFF",
-					     "Co-developed-by: must be immediately followed by Signed-off-by:\n" . "$here\n" . $rawline);
-				} elsif ($rawlines[$linenr] !~ /^\s*signed-off-by:\s*(.*)/i) {
+					     "Co-developed-by: must be immediately followed by Signed-off-by:\n" . $herecurr);
+				} elsif ($rawlines[$linenr] !~ /^signed-off-by:\s*(.*)/i) {
 					WARN("BAD_SIGN_OFF",
-					     "Co-developed-by: must be immediately followed by Signed-off-by:\n" . "$here\n" . $rawline . "\n" .$rawlines[$linenr]);
+					     "Co-developed-by: must be immediately followed by Signed-off-by:\n" . $herecurr . $rawlines[$linenr] . "\n");
 				} elsif ($1 ne $email) {
 					WARN("BAD_SIGN_OFF",
-					     "Co-developed-by and Signed-off-by: name/email do not match \n" . "$here\n" . $rawline . "\n" .$rawlines[$linenr]);
+					     "Co-developed-by and Signed-off-by: name/email do not match\n" . $herecurr . $rawlines[$linenr] . "\n");
+				}
+			}
+
+# check if Reported-by: is followed by a Link:
+			if ($sign_off =~ /^reported(?:|-and-tested)-by:$/i) {
+				if (!defined $lines[$linenr]) {
+					WARN("BAD_REPORTED_BY_LINK",
+					     "Reported-by: should be immediately followed by Link: to the report\n" . $herecurr . $rawlines[$linenr] . "\n");
+				} elsif ($rawlines[$linenr] !~ m{^link:\s*https?://}i) {
+					WARN("BAD_REPORTED_BY_LINK",
+					     "Reported-by: should be immediately followed by Link: with a URL to the report\n" . $herecurr . $rawlines[$linenr] . "\n");
 				}
 			}
 		}
 
+
 # Check Fixes: styles is correct
 		if (!$in_header_lines &&
 		    $line =~ /^\s*fixes:?\s*(?:commit\s*)?[0-9a-f]{5,}\b/i) {
@@ -3250,6 +3264,18 @@ sub process {
 			$commit_log_possible_stack_dump = 0;
 		}
 
+# Check for odd tags before a URI/URL
+		if ($in_commit_log &&
+		    $line =~ /^\s*(\w+):\s*http/ && $1 ne 'Link') {
+			if ($1 =~ /^v(?:ersion)?\d+/i) {
+				WARN("COMMIT_LOG_VERSIONING",
+				     "Patch version information should be after the --- line\n" . $herecurr);
+			} else {
+				WARN("COMMIT_LOG_USE_LINK",
+				     "Unknown link reference '$1:', use 'Link:' instead\n" . $herecurr);
+			}
+		}
+
 # Check for lines starting with a #
 		if ($in_commit_log && $line =~ /^#/) {
 			if (WARN("COMMIT_COMMENT_SYMBOL",
@@ -3725,7 +3751,7 @@ sub process {
 		}
 
 # check for embedded filenames
-		if ($rawline =~ /^\+.*\Q$realfile\E/) {
+		if ($rawline =~ /^\+.*\b\Q$realfile\E\b/) {
 			WARN("EMBEDDED_FILENAME",
 			     "It's generally not useful to have the filename in the file\n" . $herecurr);
 		}
diff --git a/scripts/gdb/linux/mm.py b/scripts/gdb/linux/mm.py
new file mode 100644
index 000000000000..30d837f3dfae
--- /dev/null
+++ b/scripts/gdb/linux/mm.py
@@ -0,0 +1,222 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# gdb helper commands and functions for Linux kernel debugging
+#
+#  routines to introspect page table
+#
+# Authors:
+#  Dmitrii Bundin <dmitrii.bundin.a@gmail.com>
+#
+
+import gdb
+
+from linux import utils
+
+PHYSICAL_ADDRESS_MASK = gdb.parse_and_eval('0xfffffffffffff')
+
+
+def page_mask(level=1):
+    # 4KB
+    if level == 1:
+        return gdb.parse_and_eval('(u64) ~0xfff')
+    # 2MB
+    elif level == 2:
+        return gdb.parse_and_eval('(u64) ~0x1fffff')
+    # 1GB
+    elif level == 3:
+        return gdb.parse_and_eval('(u64) ~0x3fffffff')
+    else:
+        raise Exception(f'Unknown page level: {level}')
+
+
+#page_offset_base in case CONFIG_DYNAMIC_MEMORY_LAYOUT is disabled
+POB_NO_DYNAMIC_MEM_LAYOUT = '0xffff888000000000'
+def _page_offset_base():
+    pob_symbol = gdb.lookup_global_symbol('page_offset_base')
+    pob = pob_symbol.name if pob_symbol else POB_NO_DYNAMIC_MEM_LAYOUT
+    return gdb.parse_and_eval(pob)
+
+
+def is_bit_defined_tupled(data, offset):
+    return offset, bool(data >> offset & 1)
+
+def content_tupled(data, bit_start, bit_end):
+    return (bit_start, bit_end), data >> bit_start & ((1 << (1 + bit_end - bit_start)) - 1)
+
+def entry_va(level, phys_addr, translating_va):
+        def start_bit(level):
+            if level == 5:
+                return 48
+            elif level == 4:
+                return 39
+            elif level == 3:
+                return 30
+            elif level == 2:
+                return 21
+            elif level == 1:
+                return 12
+            else:
+                raise Exception(f'Unknown level {level}')
+
+        entry_offset =  ((translating_va >> start_bit(level)) & 511) * 8
+        entry_va = _page_offset_base() + phys_addr + entry_offset
+        return entry_va
+
+class Cr3():
+    def __init__(self, cr3, page_levels):
+        self.cr3 = cr3
+        self.page_levels = page_levels
+        self.page_level_write_through = is_bit_defined_tupled(cr3, 3)
+        self.page_level_cache_disabled = is_bit_defined_tupled(cr3, 4)
+        self.next_entry_physical_address = cr3 & PHYSICAL_ADDRESS_MASK & page_mask()
+
+    def next_entry(self, va):
+        next_level = self.page_levels
+        return PageHierarchyEntry(entry_va(next_level, self.next_entry_physical_address, va), next_level)
+
+    def mk_string(self):
+            return f"""\
+cr3:
+    {'cr3 binary data': <30} {hex(self.cr3)}
+    {'next entry physical address': <30} {hex(self.next_entry_physical_address)}
+    ---
+    {'bit' : <4} {self.page_level_write_through[0]: <10} {'page level write through': <30} {self.page_level_write_through[1]}
+    {'bit' : <4} {self.page_level_cache_disabled[0]: <10} {'page level cache disabled': <30} {self.page_level_cache_disabled[1]}
+"""
+
+
+class PageHierarchyEntry():
+    def __init__(self, address, level):
+        data = int.from_bytes(
+            memoryview(gdb.selected_inferior().read_memory(address, 8)),
+            "little"
+        )
+        if level == 1:
+            self.is_page = True
+            self.entry_present = is_bit_defined_tupled(data, 0)
+            self.read_write = is_bit_defined_tupled(data, 1)
+            self.user_access_allowed = is_bit_defined_tupled(data, 2)
+            self.page_level_write_through = is_bit_defined_tupled(data, 3)
+            self.page_level_cache_disabled = is_bit_defined_tupled(data, 4)
+            self.entry_was_accessed = is_bit_defined_tupled(data, 5)
+            self.dirty = is_bit_defined_tupled(data, 6)
+            self.pat = is_bit_defined_tupled(data, 7)
+            self.global_translation = is_bit_defined_tupled(data, 8)
+            self.page_physical_address = data & PHYSICAL_ADDRESS_MASK & page_mask(level)
+            self.next_entry_physical_address = None
+            self.hlat_restart_with_ordinary = is_bit_defined_tupled(data, 11)
+            self.protection_key = content_tupled(data, 59, 62)
+            self.executed_disable = is_bit_defined_tupled(data, 63)
+        else:
+            page_size = is_bit_defined_tupled(data, 7)
+            page_size_bit = page_size[1]
+            self.is_page = page_size_bit
+            self.entry_present = is_bit_defined_tupled(data, 0)
+            self.read_write = is_bit_defined_tupled(data, 1)
+            self.user_access_allowed = is_bit_defined_tupled(data, 2)
+            self.page_level_write_through = is_bit_defined_tupled(data, 3)
+            self.page_level_cache_disabled = is_bit_defined_tupled(data, 4)
+            self.entry_was_accessed = is_bit_defined_tupled(data, 5)
+            self.page_size = page_size
+            self.dirty = is_bit_defined_tupled(
+                data, 6) if page_size_bit else None
+            self.global_translation = is_bit_defined_tupled(
+                data, 8) if page_size_bit else None
+            self.pat = is_bit_defined_tupled(
+                data, 12) if page_size_bit else None
+            self.page_physical_address = data & PHYSICAL_ADDRESS_MASK & page_mask(level) if page_size_bit else None
+            self.next_entry_physical_address = None if page_size_bit else data & PHYSICAL_ADDRESS_MASK & page_mask()
+            self.hlat_restart_with_ordinary = is_bit_defined_tupled(data, 11)
+            self.protection_key = content_tupled(data, 59, 62) if page_size_bit else None
+            self.executed_disable = is_bit_defined_tupled(data, 63)
+        self.address = address
+        self.page_entry_binary_data = data
+        self.page_hierarchy_level = level
+
+    def next_entry(self, va):
+        if self.is_page or not self.entry_present[1]:
+            return None
+
+        next_level = self.page_hierarchy_level - 1
+        return PageHierarchyEntry(entry_va(next_level, self.next_entry_physical_address, va), next_level)
+
+
+    def mk_string(self):
+        if not self.entry_present[1]:
+            return f"""\
+level {self.page_hierarchy_level}:
+    {'entry address': <30} {hex(self.address)}
+    {'page entry binary data': <30} {hex(self.page_entry_binary_data)}
+    ---
+    PAGE ENTRY IS NOT PRESENT!
+"""
+        elif self.is_page:
+            def page_size_line(ps_bit, ps, level):
+                return "" if level == 1 else f"{'bit': <3} {ps_bit: <5} {'page size': <30} {ps}"
+
+            return f"""\
+level {self.page_hierarchy_level}:
+    {'entry address': <30} {hex(self.address)}
+    {'page entry binary data': <30} {hex(self.page_entry_binary_data)}
+    {'page size': <30} {'1GB' if self.page_hierarchy_level == 3 else '2MB' if self.page_hierarchy_level == 2 else '4KB' if self.page_hierarchy_level == 1 else 'Unknown page size for level:' + self.page_hierarchy_level}
+    {'page physical address': <30} {hex(self.page_physical_address)}
+    ---
+    {'bit': <4} {self.entry_present[0]: <10} {'entry present': <30} {self.entry_present[1]}
+    {'bit': <4} {self.read_write[0]: <10} {'read/write access allowed': <30} {self.read_write[1]}
+    {'bit': <4} {self.user_access_allowed[0]: <10} {'user access allowed': <30} {self.user_access_allowed[1]}
+    {'bit': <4} {self.page_level_write_through[0]: <10} {'page level write through': <30} {self.page_level_write_through[1]}
+    {'bit': <4} {self.page_level_cache_disabled[0]: <10} {'page level cache disabled': <30} {self.page_level_cache_disabled[1]}
+    {'bit': <4} {self.entry_was_accessed[0]: <10} {'entry has been accessed': <30} {self.entry_was_accessed[1]}
+    {"" if self.page_hierarchy_level == 1 else f"{'bit': <4} {self.page_size[0]: <10} {'page size': <30} {self.page_size[1]}"}
+    {'bit': <4} {self.dirty[0]: <10} {'page dirty': <30} {self.dirty[1]}
+    {'bit': <4} {self.global_translation[0]: <10} {'global translation': <30} {self.global_translation[1]}
+    {'bit': <4} {self.hlat_restart_with_ordinary[0]: <10} {'restart to ordinary': <30} {self.hlat_restart_with_ordinary[1]}
+    {'bit': <4} {self.pat[0]: <10} {'pat': <30} {self.pat[1]}
+    {'bits': <4} {str(self.protection_key[0]): <10} {'protection key': <30} {self.protection_key[1]}
+    {'bit': <4} {self.executed_disable[0]: <10} {'execute disable': <30} {self.executed_disable[1]}
+"""
+        else:
+            return f"""\
+level {self.page_hierarchy_level}:
+    {'entry address': <30} {hex(self.address)}
+    {'page entry binary data': <30} {hex(self.page_entry_binary_data)}
+    {'next entry physical address': <30} {hex(self.next_entry_physical_address)}
+    ---
+    {'bit': <4} {self.entry_present[0]: <10} {'entry present': <30} {self.entry_present[1]}
+    {'bit': <4} {self.read_write[0]: <10} {'read/write access allowed': <30} {self.read_write[1]}
+    {'bit': <4} {self.user_access_allowed[0]: <10} {'user access allowed': <30} {self.user_access_allowed[1]}
+    {'bit': <4} {self.page_level_write_through[0]: <10} {'page level write through': <30} {self.page_level_write_through[1]}
+    {'bit': <4} {self.page_level_cache_disabled[0]: <10} {'page level cache disabled': <30} {self.page_level_cache_disabled[1]}
+    {'bit': <4} {self.entry_was_accessed[0]: <10} {'entry has been accessed': <30} {self.entry_was_accessed[1]}
+    {'bit': <4} {self.page_size[0]: <10} {'page size': <30} {self.page_size[1]}
+    {'bit': <4} {self.hlat_restart_with_ordinary[0]: <10} {'restart to ordinary': <30} {self.hlat_restart_with_ordinary[1]}
+    {'bit': <4} {self.executed_disable[0]: <10} {'execute disable': <30} {self.executed_disable[1]}
+"""
+
+
+class TranslateVM(gdb.Command):
+    """Prints the entire paging structure used to translate a given virtual address.
+
+Having an address space of the currently executed process translates the virtual address
+and prints detailed information of all paging structure levels used for the transaltion.
+Currently supported arch: x86"""
+
+    def __init__(self):
+        super(TranslateVM, self).__init__('translate-vm', gdb.COMMAND_USER)
+
+    def invoke(self, arg, from_tty):
+        if utils.is_target_arch("x86"):
+            vm_address = gdb.parse_and_eval(f'{arg}')
+            cr3_data = gdb.parse_and_eval('$cr3')
+            cr4 = gdb.parse_and_eval('$cr4')
+            page_levels = 5 if cr4 & (1 << 12) else 4
+            page_entry = Cr3(cr3_data, page_levels)
+            while page_entry:
+                gdb.write(page_entry.mk_string())
+                page_entry = page_entry.next_entry(vm_address)
+        else:
+            gdb.GdbError("Virtual address translation is not"
+                         "supported for this arch")
+
+
+TranslateVM()
diff --git a/scripts/gdb/vmlinux-gdb.py b/scripts/gdb/vmlinux-gdb.py
index 3e8d3669f0ce..3a5b44cd6bfe 100644
--- a/scripts/gdb/vmlinux-gdb.py
+++ b/scripts/gdb/vmlinux-gdb.py
@@ -37,3 +37,4 @@ else:
     import linux.clk
     import linux.genpd
     import linux.device
+    import linux.mm
diff --git a/scripts/spelling.txt b/scripts/spelling.txt
index ded8bcfc0247..f8bd6178d17b 100644
--- a/scripts/spelling.txt
+++ b/scripts/spelling.txt
@@ -65,6 +65,7 @@ acumulative||accumulative
 acumulator||accumulator
 acutally||actually
 adapater||adapter
+adderted||asserted
 addional||additional
 additionaly||additionally
 additonal||additional
@@ -122,6 +123,7 @@ alue||value
 ambigious||ambiguous
 ambigous||ambiguous
 amoung||among
+amount of times||number of times
 amout||amount
 amplifer||amplifier
 amplifyer||amplifier
@@ -287,6 +289,7 @@ capapbilities||capabilities
 caputure||capture
 carefuly||carefully
 cariage||carriage
+casued||caused
 catagory||category
 cehck||check
 challange||challenge
@@ -370,6 +373,7 @@ conbination||combination
 conditionaly||conditionally
 conditon||condition
 condtion||condition
+condtional||conditional
 conected||connected
 conector||connector
 configration||configuration
@@ -423,6 +427,7 @@ cound||could
 couter||counter
 coutner||counter
 cryptocraphic||cryptographic
+cummulative||cumulative
 cunter||counter
 curently||currently
 cylic||cyclic
@@ -625,8 +630,10 @@ exeuction||execution
 existance||existence
 existant||existent
 exixt||exist
+exsits||exists
 exlcude||exclude
 exlcusive||exclusive
+exlusive||exclusive
 exmaple||example
 expecially||especially
 experies||expires
@@ -664,11 +671,13 @@ feauture||feature
 feautures||features
 fetaure||feature
 fetaures||features
+fetcing||fetching
 fileystem||filesystem
 fimrware||firmware
 fimware||firmware
 firmare||firmware
 firmaware||firmware
+firtly||firstly
 firware||firmware
 firwmare||firmware
 finanize||finalize
@@ -838,6 +847,7 @@ integrety||integrity
 integrey||integrity
 intendet||intended
 intented||intended
+interal||internal
 interanl||internal
 interchangable||interchangeable
 interferring||interfering
@@ -1023,6 +1033,7 @@ negotation||negotiation
 nerver||never
 nescessary||necessary
 nessessary||necessary
+none existent||non-existent
 noticable||noticeable
 notication||notification
 notications||notifications
@@ -1044,6 +1055,7 @@ occured||occurred
 occurence||occurrence
 occure||occurred
 occuring||occurring
+ocurrence||occurrence
 offser||offset
 offet||offset
 offlaod||offload
@@ -1055,6 +1067,7 @@ omitt||omit
 ommiting||omitting
 ommitted||omitted
 onself||oneself
+onthe||on the
 ony||only
 openning||opening
 operatione||operation
@@ -1121,6 +1134,7 @@ perfomring||performing
 periperal||peripheral
 peripherial||peripheral
 permissons||permissions
+permited||permitted
 peroid||period
 persistance||persistence
 persistant||persistent
@@ -1334,6 +1348,7 @@ sacrifying||sacrificing
 safly||safely
 safty||safety
 satify||satisfy
+satisifed||satisfied
 savable||saveable
 scaleing||scaling
 scaned||scanned
@@ -1558,6 +1573,7 @@ tunning||tuning
 ture||true
 tyep||type
 udpate||update
+updtes||updates
 uesd||used
 unknwon||unknown
 uknown||unknown
@@ -1614,6 +1630,7 @@ unuseful||useless
 unvalid||invalid
 upate||update
 upsupported||unsupported
+upto||up to
 useable||usable
 usefule||useful
 usefull||useful
diff --git a/scripts/tags.sh b/scripts/tags.sh
index e137cf15aae9..84775f08260f 100755
--- a/scripts/tags.sh
+++ b/scripts/tags.sh
@@ -264,10 +264,12 @@ exuberant()
 	--$CTAGS_EXTRA=+fq --c-kinds=+px --fields=+iaS --langmap=c:+.h \
 	"${regex[@]}"
 
-	setup_regex exuberant kconfig
-	all_kconfigs | xargs $1 -a                              \
-	--langdef=kconfig --language-force=kconfig "${regex[@]}"
-
+	KCONFIG_ARGS=()
+	if ! $1 --list-languages | grep -iq kconfig; then
+		setup_regex exuberant kconfig
+		KCONFIG_ARGS=(--langdef=kconfig --language-force=kconfig "${regex[@]}")
+	fi
+	all_kconfigs | xargs $1 -a "${KCONFIG_ARGS[@]}"
 }
 
 emacs()