Merge tag 's390-6.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull more s390 updates from Vasily Gorbik:

 - Fix machine check handler _CIF_MCCK_GUEST bit setting by adding the
   missing base register for relocated lowcore address

 - Fix build failure on older linkers by conditionally adding the
   -no-pie linker option only when it is supported

 - Fix inaccurate kernel messages in vfio-ap by providing descriptive
   error notifications for AP queue sharing violations

 - Fix PCI isolation logic by ensuring non-VF devices correctly return
   false in zpci_bus_is_isolated_vf()

 - Fix PCI DMA range map setup by using dma_direct_set_offset() to add a
   proper sentinel element, preventing potential overruns and
   translation errors

 - Cleanup header dependency problems with asm-offsets.c

 - Add fault info for unexpected low-address protection faults in user
   mode

 - Add support for HOTPLUG_SMT, replacing the arch-specific "nosmt"
   handling with common code handling

 - Use bitop functions to implement CPU flag helper functions to ensure
   that bits cannot get lost if modified in different contexts on a CPU

 - Remove unused machine_flags for the lowcore

* tag 's390-6.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/vfio-ap: Fix no AP queue sharing allowed message written to kernel log
  s390/pci: Fix dev.dma_range_map missing sentinel element
  s390/mm: Dump fault info in case of low address protection fault
  s390/smp: Add support for HOTPLUG_SMT
  s390: Fix linker error when -no-pie option is unavailable
  s390/processor: Use bitop functions for cpu flag helper functions
  s390/asm-offsets: Remove ASM_OFFSETS_C
  s390/asm-offsets: Include ftrace_regs.h instead of ftrace.h
  s390/kvm: Split kvm_host header file
  s390/pci: Fix zpci_bus_is_isolated_vf() for non-VFs
  s390/lowcore: Remove unused machine_flags
  s390/entry: Fix setting _CIF_MCCK_GUEST with lowcore relocation

1 files changed, 7 insertions, 12 deletions

diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index d09a92db95f7..6c8063cb8fe7 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -31,6 +31,7 @@
 #include <linux/cpumask.h>
 #include <linux/linkage.h>
 #include <linux/irqflags.h>
+#include <linux/bitops.h>
 #include <asm/fpu-types.h>
 #include <asm/cpu.h>
 #include <asm/page.h>
@@ -62,33 +63,27 @@ static __always_inline struct pcpu *this_pcpu(void)
 
 static __always_inline void set_cpu_flag(int flag)
 {
-	this_pcpu()->flags |= (1UL << flag);
+	set_bit(flag, &this_pcpu()->flags);
 }
 
 static __always_inline void clear_cpu_flag(int flag)
 {
-	this_pcpu()->flags &= ~(1UL << flag);
+	clear_bit(flag, &this_pcpu()->flags);
 }
 
 static __always_inline bool test_cpu_flag(int flag)
 {
-	return this_pcpu()->flags & (1UL << flag);
+	return test_bit(flag, &this_pcpu()->flags);
 }
 
 static __always_inline bool test_and_set_cpu_flag(int flag)
 {
-	if (test_cpu_flag(flag))
-		return true;
-	set_cpu_flag(flag);
-	return false;
+	return test_and_set_bit(flag, &this_pcpu()->flags);
 }
 
 static __always_inline bool test_and_clear_cpu_flag(int flag)
 {
-	if (!test_cpu_flag(flag))
-		return false;
-	clear_cpu_flag(flag);
-	return true;
+	return test_and_clear_bit(flag, &this_pcpu()->flags);
 }
 
 /*
@@ -97,7 +92,7 @@ static __always_inline bool test_and_clear_cpu_flag(int flag)
  */
 static __always_inline bool test_cpu_flag_of(int flag, int cpu)
 {
-	return per_cpu(pcpu_devices, cpu).flags & (1UL << flag);
+	return test_bit(flag, &per_cpu(pcpu_devices, cpu).flags);
 }
 
 #define arch_needs_cpu() test_cpu_flag(CIF_NOHZ_DELAY)