x86/microcode/intel: Get rid of revision_is_newer()

It is a one-liner for checking microcode header revisions. On top of
that, it can be used wrong as it was the case in _save_mc(). Get rid of
it.
Signed-off-by: NBorislav Petkov <bp@suse.de>
Acked-by: NQuentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: NIngo Molnar <mingo@kernel.org>

arch/x86/include/asm/microcode_intel.h

@@ -60,12 +60,6 @@ extern int get_matching_microcode(unsigned int csig, int cpf, int rev, void *mc)
 extern int microcode_sanity_check(void *mc, int print_err);
 extern int get_matching_sig(unsigned int csig, int cpf, int rev, void *mc);
 
-static inline int
-revision_is_newer(struct microcode_header_intel *mc_header, int rev)
-{
-	return (mc_header->rev <= rev) ? 0 : 1;
-}
-
 #ifdef CONFIG_MICROCODE_INTEL_EARLY
 extern void __init load_ucode_intel_bsp(void);
 extern void load_ucode_intel_ap(void);

arch/x86/kernel/cpu/microcode/intel_early.c

@@ -262,7 +262,7 @@ static unsigned int _save_mc(struct microcode_intel **mc_saved,
 
 		found = 1;
 
-		if (!revision_is_newer(mc_hdr, new_rev))
+		if (mc_hdr->rev <= mc_saved_hdr->rev)
 			continue;
 
 		/*

arch/x86/kernel/cpu/microcode/intel_lib.c

@@ -154,13 +154,13 @@ int get_matching_sig(unsigned int csig, int cpf, int rev, void *mc)
 /*
  * Returns 1 if update has been found, 0 otherwise.
  */
-int get_matching_microcode(unsigned int csig, int cpf, int rev, void *mc)
+int get_matching_microcode(unsigned int csig, int cpf, int new_rev, void *mc)
 {
 	struct microcode_header_intel *mc_hdr = mc;
 
-	if (!revision_is_newer(mc_hdr, rev))
+	if (mc_hdr->rev <= new_rev)
 		return 0;
 
-	return get_matching_sig(csig, cpf, rev, mc);
+	return get_matching_sig(csig, cpf, new_rev, mc);
 }
 EXPORT_SYMBOL_GPL(get_matching_microcode);