[PATCH 4.14 01/34] Revert "x86/cpu: Add a steppings field to struct x86_cpu_id"

[Suraj Jitindar Singh <surajjs@amazon.com>]

This reverts commit ae585de4296413ae4bbb8f2ac09faa38ff78f4cd.

This is commit e9d7144597b10ff13ff2264c059f7d4a7fbc89ac upstream. Reverting this
commit makes the following patches apply cleanly. This patch is then reapplied.

Signed-off-by: Suraj Jitindar Singh <surajjs@amazon.com>
---
 arch/x86/include/asm/cpu_device_id.h | 27 ---------------------------
 arch/x86/kernel/cpu/match.c          |  7 +------
 include/linux/mod_devicetable.h      |  6 ------
 3 files changed, 1 insertion(+), 39 deletions(-)

diff --git a/arch/x86/include/asm/cpu_device_id.h b/arch/x86/include/asm/cpu_device_id.h
index 884466592943..baeba0567126 100644
--- a/arch/x86/include/asm/cpu_device_id.h
+++ b/arch/x86/include/asm/cpu_device_id.h
@@ -9,33 +9,6 @@
 
 #include <linux/mod_devicetable.h>
 
-#define X86_STEPPINGS(mins, maxs)    GENMASK(maxs, mins)
-
-/**
- * X86_MATCH_VENDOR_FAM_MODEL_STEPPINGS_FEATURE - Base macro for CPU matching
- * @_vendor:	The vendor name, e.g. INTEL, AMD, HYGON, ..., ANY
- *		The name is expanded to X86_VENDOR_@_vendor
- * @_family:	The family number or X86_FAMILY_ANY
- * @_model:	The model number, model constant or X86_MODEL_ANY
- * @_steppings:	Bitmask for steppings, stepping constant or X86_STEPPING_ANY
- * @_feature:	A X86_FEATURE bit or X86_FEATURE_ANY
- * @_data:	Driver specific data or NULL. The internal storage
- *		format is unsigned long. The supplied value, pointer
- *		etc. is casted to unsigned long internally.
- *
- * Backport version to keep the SRBDS pile consistant. No shorter variants
- * required for this.
- */
-#define X86_MATCH_VENDOR_FAM_MODEL_STEPPINGS_FEATURE(_vendor, _family, _model, \
-						    _steppings, _feature, _data) { \
-	.vendor		= X86_VENDOR_##_vendor,				\
-	.family		= _family,					\
-	.model		= _model,					\
-	.steppings	= _steppings,					\
-	.feature	= _feature,					\
-	.driver_data	= (unsigned long) _data				\
-}
-
 extern const struct x86_cpu_id *x86_match_cpu(const struct x86_cpu_id *match);
 
 #endif
diff --git a/arch/x86/kernel/cpu/match.c b/arch/x86/kernel/cpu/match.c
index 751e59057466..3fed38812eea 100644
--- a/arch/x86/kernel/cpu/match.c
+++ b/arch/x86/kernel/cpu/match.c
@@ -34,18 +34,13 @@ const struct x86_cpu_id *x86_match_cpu(const struct x86_cpu_id *match)
 	const struct x86_cpu_id *m;
 	struct cpuinfo_x86 *c = &boot_cpu_data;
 
-	for (m = match;
-	     m->vendor | m->family | m->model | m->steppings | m->feature;
-	     m++) {
+	for (m = match; m->vendor | m->family | m->model | m->feature; m++) {
 		if (m->vendor != X86_VENDOR_ANY && c->x86_vendor != m->vendor)
 			continue;
 		if (m->family != X86_FAMILY_ANY && c->x86 != m->family)
 			continue;
 		if (m->model != X86_MODEL_ANY && c->x86_model != m->model)
 			continue;
-		if (m->steppings != X86_STEPPING_ANY &&
-		    !(BIT(c->x86_stepping) & m->steppings))
-			continue;
 		if (m->feature != X86_FEATURE_ANY && !cpu_has(c, m->feature))
 			continue;
 		return m;
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 6f8eb1238235..f3c631fe076a 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -589,10 +589,6 @@ struct mips_cdmm_device_id {
 /*
  * MODULE_DEVICE_TABLE expects this struct to be called x86cpu_device_id.
  * Although gcc seems to ignore this error, clang fails without this define.
- *
- * Note: The ordering of the struct is different from upstream because the
- * static initializers in kernels < 5.7 still use C89 style while upstream
- * has been converted to proper C99 initializers.
  */
 #define x86cpu_device_id x86_cpu_id
 struct x86_cpu_id {
@@ -601,7 +597,6 @@ struct x86_cpu_id {
 	__u16 model;
 	__u16 feature;	/* bit index */
 	kernel_ulong_t driver_data;
-	__u16 steppings;
 };
 
 #define X86_FEATURE_MATCH(x) \
@@ -610,7 +605,6 @@ struct x86_cpu_id {
 #define X86_VENDOR_ANY 0xffff
 #define X86_FAMILY_ANY 0
 #define X86_MODEL_ANY  0
-#define X86_STEPPING_ANY 0
 #define X86_FEATURE_ANY 0	/* Same as FPU, you can't test for that */
 
 /*
-- 
2.17.1