diff --git a/libsanitizer/ChangeLog b/libsanitizer/ChangeLog
index 82b7b112d94..e96f13b4ae6 100644
--- a/libsanitizer/ChangeLog
+++ b/libsanitizer/ChangeLog
@@ -1,3 +1,13 @@
+2019-12-20  Jakub Jelinek  <jakub@redhat.com>
+
+	Backported from mainline
+	2019-11-26  Jakub Jelinek  <jakub@redhat.com>
+
+	PR sanitizer/92154
+	* sanitizer_common/sanitizer_platform_limits_posix.h: Cherry-pick
+	llvm-project revision 947f9692440836dcb8d88b74b69dd379d85974ce.
+	* sanitizer_common/sanitizer_platform_limits_posix.cc: Likewise.
+
 2019-11-08  Jakub Jelinek  <jakub@redhat.com>
 
 	Backported from mainline
diff --git a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc
index 06a605ff467..d823a12190c 100644
--- a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc
+++ b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc
@@ -1156,12 +1156,9 @@ CHECK_SIZE_AND_OFFSET(ipc_perm, uid);
 CHECK_SIZE_AND_OFFSET(ipc_perm, gid);
 CHECK_SIZE_AND_OFFSET(ipc_perm, cuid);
 CHECK_SIZE_AND_OFFSET(ipc_perm, cgid);
-#if (!defined(__aarch64__) || !SANITIZER_LINUX || __GLIBC_PREREQ (2, 21)) && \
-    !defined(__arm__)
-/* On aarch64 glibc 2.20 and earlier provided incorrect mode field.  */
-/* On Arm glibc 2.31 and later provide a different mode field, this field is
-   never used by libsanitizer so we can simply ignore this assert for all glibc
-   versions.  */
+#if !SANITIZER_LINUX || __GLIBC_PREREQ (2, 31)
+/* glibc 2.30 and earlier provided 16-bit mode field instead of 32-bit
+   on many architectures.  */
 CHECK_SIZE_AND_OFFSET(ipc_perm, mode);
 #endif
 
diff --git a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h
index 73af92af1e8..6a673a7c995 100644
--- a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h
+++ b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h
@@ -211,26 +211,13 @@ namespace __sanitizer {
     u64 __unused1;
     u64 __unused2;
 #elif defined(__sparc__)
-#if defined(__arch64__)
     unsigned mode;
-    unsigned short __pad1;
-#else
-    unsigned short __pad1;
-    unsigned short mode;
     unsigned short __pad2;
-#endif
     unsigned short __seq;
     unsigned long long __unused1;
     unsigned long long __unused2;
-#elif defined(__mips__) || defined(__aarch64__) || defined(__s390x__)
-    unsigned int mode;
-    unsigned short __seq;
-    unsigned short __pad1;
-    unsigned long __unused1;
-    unsigned long __unused2;
 #else
-    unsigned short mode;
-    unsigned short __pad1;
+    unsigned int mode;
     unsigned short __seq;
     unsigned short __pad2;
 #if defined(__x86_64__) && !defined(_LP64)