Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Catalin Marinas:

 - Avoid writing an uninitialised stack variable to POR_EL0 on sigreturn
   if the poe_context record is absent

 - Reserve one more page for the early 4K-page kernel mapping to cover
   the extra [_text, _stext) split introduced by the non-executable
   read-only mapping

 - Force the arch_local_irq_*() wrappers to be __always_inline so that
   noinstr entry and idle paths cannot call out-of-line, instrumentable
   copies

 - Fix potential sign extension in the arm64 SCS unwinder's DWARF
   advance_loc4 decoding

 - Tolerate arm64 ACPI platforms with only WFI and no deeper PSCI idle
   states, restoring cpuidle registration on such systems

 - Include the UAPI <asm/ptrace.h> header in the arm64 GCS libc test
   rather than carrying a duplicate struct user_gcs definition (the
   original #ifdef NT_ARM_GCS was wrong to cover the structure
   definition as it would be masked out if the toolchain defined it)

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: signal: Preserve POR_EL0 if poe_context is missing
  arm64: Reserve an extra page for early kernel mapping
  kselftest/arm64: Include <asm/ptrace.h> for user_gcs definition
  ACPI: arm64: cpuidle: Tolerate platforms with no deep PSCI idle states
  arm64/irqflags: __always_inline the arch_local_irq_*() helpers
  arm64/scs: Fix potential sign extension issue of advance_loc4

1 files changed, 3 insertions, 7 deletions

diff --git a/drivers/acpi/arm64/cpuidle.c b/drivers/acpi/arm64/cpuidle.c
index 801f9c450142..c68a5db8ebba 100644
--- a/drivers/acpi/arm64/cpuidle.c
+++ b/drivers/acpi/arm64/cpuidle.c
@@ -16,7 +16,7 @@
 
 static int psci_acpi_cpu_init_idle(unsigned int cpu)
 {
-	int i, count;
+	int i;
 	struct acpi_lpi_state *lpi;
 	struct acpi_processor *pr = per_cpu(processors, cpu);
 
@@ -30,14 +30,10 @@ static int psci_acpi_cpu_init_idle(unsigned int cpu)
 	if (!psci_ops.cpu_suspend)
 		return -EOPNOTSUPP;
 
-	count = pr->power.count - 1;
-	if (count <= 0)
-		return -ENODEV;
-
-	for (i = 0; i < count; i++) {
+	for (i = 1; i < pr->power.count; i++) {
 		u32 state;
 
-		lpi = &pr->power.lpi_states[i + 1];
+		lpi = &pr->power.lpi_states[i];
 		/*
 		 * Only bits[31:0] represent a PSCI power_state while
 		 * bits[63:32] must be 0x0 as per ARM ACPI FFH Specification