Merge branch 'for-next/fpsimd' into for-next/core

* for-next/fpsimd:
  arm64: cpufeature: Warn if we attempt to read a zero width field
  arm64: cpufeature: Add missing .field_width for GIC system registers
  arm64: signal: nofpsimd: Do not allocate fp/simd context when not available
  arm64: cpufeature: Always specify and use a field width for capabilities
  arm64: Always use individual bits in CPACR floating point enables
  arm64: Define CPACR_EL1_FPEN similarly to other floating point controls

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h
index fe7137ff6190..380238ae3321 100644
--- a/arch/arm64/include/asm/cpufeature.h
+++ b/arch/arm64/include/asm/cpufeature.h
@@ -356,6 +356,7 @@ struct arm64_cpu_capabilities {
 		struct {	/* Feature register checking */
 			u32 sys_reg;
 			u8 field_pos;
+			u8 field_width;
 			u8 min_field_value;
 			u8 hwcap_type;
 			bool sign;
@@ -576,6 +577,8 @@ static inline u64 arm64_ftr_reg_user_value(const struct arm64_ftr_reg *reg)
 static inline int __attribute_const__
 cpuid_feature_extract_field_width(u64 features, int field, int width, bool sign)
 {
+	if (WARN_ON_ONCE(!width))
+		width = 4;
 	return (sign) ?
 		cpuid_feature_extract_signed_field_width(features, field, width) :
 		cpuid_feature_extract_unsigned_field_width(features, field, width);