Merge tag 's390-6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Vasily Gorbik:

 - Add support for stackleak feature. Also allow specifying
   architecture-specific stackleak poison function to enable faster
   implementation. On s390, the mvc-based implementation helps decrease
   typical overhead from a factor of 3 to just 25%

 - Convert all assembler files to use SYM* style macros, deprecating the
   ENTRY() macro and other annotations. Select ARCH_USE_SYM_ANNOTATIONS

 - Improve KASLR to also randomize module and special amode31 code base
   load addresses

 - Rework decompressor memory tracking to support memory holes and
   improve error handling

 - Add support for protected virtualization AP binding

 - Add support for set_direct_map() calls

 - Implement set_memory_rox() and noexec module_alloc()

 - Remove obsolete overriding of mem*() functions for KASAN

 - Rework kexec/kdump to avoid using nodat_stack to call purgatory

 - Convert the rest of the s390 code to use flexible-array member
   instead of a zero-length array

 - Clean up uaccess inline asm

 - Enable ARCH_HAS_MEMBARRIER_SYNC_CORE

 - Convert to using CONFIG_FUNCTION_ALIGNMENT and enable
   DEBUG_FORCE_FUNCTION_ALIGN_64B

 - Resolve last_break in userspace fault reports

 - Simplify one-level sysctl registration

 - Clean up branch prediction handling

 - Rework CPU counter facility to retrieve available counter sets just
   once

 - Other various small fixes and improvements all over the code

* tag 's390-6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (118 commits)
  s390/stackleak: provide fast __stackleak_poison() implementation
  stackleak: allow to specify arch specific stackleak poison function
  s390: select ARCH_USE_SYM_ANNOTATIONS
  s390/mm: use VM_FLUSH_RESET_PERMS in module_alloc()
  s390: wire up memfd_secret system call
  s390/mm: enable ARCH_HAS_SET_DIRECT_MAP
  s390/mm: use BIT macro to generate SET_MEMORY bit masks
  s390/relocate_kernel: adjust indentation
  s390/relocate_kernel: use SYM* macros instead of ENTRY(), etc.
  s390/entry: use SYM* macros instead of ENTRY(), etc.
  s390/purgatory: use SYM* macros instead of ENTRY(), etc.
  s390/kprobes: use SYM* macros instead of ENTRY(), etc.
  s390/reipl: use SYM* macros instead of ENTRY(), etc.
  s390/head64: use SYM* macros instead of ENTRY(), etc.
  s390/earlypgm: use SYM* macros instead of ENTRY(), etc.
  s390/mcount: use SYM* macros instead of ENTRY(), etc.
  s390/crc32le: use SYM* macros instead of ENTRY(), etc.
  s390/crc32be: use SYM* macros instead of ENTRY(), etc.
  s390/crypto,chacha: use SYM* macros instead of ENTRY(), etc.
  s390/amode31: use SYM* macros instead of ENTRY(), etc.
  ...

1 files changed, 20 insertions, 6 deletions

diff --git a/arch/s390/kernel/mcount.S b/arch/s390/kernel/mcount.S
index 6c10da43b538..dbece2803c50 100644
--- a/arch/s390/kernel/mcount.S
+++ b/arch/s390/kernel/mcount.S
@@ -28,9 +28,9 @@
 
 	.section .kprobes.text, "ax"
 
-ENTRY(ftrace_stub)
+SYM_FUNC_START(ftrace_stub)
 	BR_EX	%r14
-ENDPROC(ftrace_stub)
+SYM_FUNC_END(ftrace_stub)
 
 SYM_CODE_START(ftrace_stub_direct_tramp)
 	lgr	%r1, %r0
@@ -140,10 +140,25 @@ SYM_FUNC_END(return_to_handler)
 #endif
 #endif /* CONFIG_FUNCTION_TRACER */
 
-#ifdef CONFIG_RETHOOK
+SYM_CODE_START(ftrace_shared_hotpatch_trampoline_br)
+	lmg	%r0,%r1,2(%r1)
+	br	%r1
+SYM_INNER_LABEL(ftrace_shared_hotpatch_trampoline_br_end, SYM_L_GLOBAL)
+SYM_CODE_END(ftrace_shared_hotpatch_trampoline_br)
+
+#ifdef CONFIG_EXPOLINE
+SYM_CODE_START(ftrace_shared_hotpatch_trampoline_exrl)
+	lmg	%r0,%r1,2(%r1)
+	exrl	%r0,0f
+	j	.
+0:	br	%r1
+SYM_INNER_LABEL(ftrace_shared_hotpatch_trampoline_exrl_end, SYM_L_GLOBAL)
+SYM_CODE_END(ftrace_shared_hotpatch_trampoline_exrl)
+#endif /* CONFIG_EXPOLINE */
 
-SYM_FUNC_START(arch_rethook_trampoline)
+#ifdef CONFIG_RETHOOK
 
+SYM_CODE_START(arch_rethook_trampoline)
 	stg	%r14,(__SF_GPRS+8*8)(%r15)
 	lay	%r15,-STACK_FRAME_SIZE(%r15)
 	stmg	%r0,%r14,STACK_PTREGS_GPRS(%r15)
@@ -166,7 +181,6 @@ SYM_FUNC_START(arch_rethook_trampoline)
 	mvc	__SF_EMPTY(16,%r7),STACK_PTREGS_PSW(%r15)
 	lmg	%r0,%r15,STACK_PTREGS_GPRS(%r15)
 	lpswe	__SF_EMPTY(%r15)
-
-SYM_FUNC_END(arch_rethook_trampoline)
+SYM_CODE_END(arch_rethook_trampoline)
 
 #endif /* CONFIG_RETHOOK */