linux-kernel - [tip: x86/cpu] x86/mtrr: Get rid of __mtrr

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Date:   Thu, 10 Nov 2022 12:21:51 -0000
From:   "tip-bot2 for Juergen Gross" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Juergen Gross <jgross@...e.com>, Borislav Petkov <bp@...e.de>,
        x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: x86/cpu] x86/mtrr: Get rid of __mtrr_enabled bool

The following commit has been merged into the x86/cpu branch of tip:

Commit-ID:     2c15679e8687d5934e1a70fe50ce409bb8a2aba1
Gitweb:        https://git.kernel.org/tip/2c15679e8687d5934e1a70fe50ce409bb8a2aba1
Author:        Juergen Gross <jgross@...e.com>
AuthorDate:    Wed, 02 Nov 2022 08:47:07 +01:00
Committer:     Borislav Petkov <bp@...e.de>
CommitterDate: Thu, 10 Nov 2022 13:12:45 +01:00

x86/mtrr: Get rid of __mtrr_enabled bool

There is no need for keeping __mtrr_enabled as it can easily be replaced
by testing mtrr_if to be not NULL.

Signed-off-by: Juergen Gross <jgross@...e.com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Link: https://lore.kernel.org/r/20221102074713.21493-11-jgross@suse.com
Signed-off-by: Borislav Petkov <bp@...e.de>
---
 arch/x86/kernel/cpu/mtrr/mtrr.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/cpu/mtrr/mtrr.c b/arch/x86/kernel/cpu/mtrr/mtrr.c
index a468be5..f671be9 100644
--- a/arch/x86/kernel/cpu/mtrr/mtrr.c
+++ b/arch/x86/kernel/cpu/mtrr/mtrr.c
@@ -59,11 +59,9 @@
 #define MTRR_TO_PHYS_WC_OFFSET 1000
 
 u32 num_var_ranges;
-static bool __mtrr_enabled;
-
 static bool mtrr_enabled(void)
 {
-	return __mtrr_enabled;
+	return !!mtrr_if;
 }
 
 unsigned int mtrr_usage_table[MTRR_MAX_VAR_RANGES];
@@ -755,18 +753,17 @@ void __init mtrr_bp_init(void)
 		}
 	}
 
-	if (mtrr_if) {
-		__mtrr_enabled = true;
+	if (mtrr_enabled()) {
 		set_num_var_ranges(mtrr_if == &generic_mtrr_ops);
 		init_table();
 		if (mtrr_if == &generic_mtrr_ops) {
 			/* BIOS may override */
-			__mtrr_enabled = get_mtrr_state();
-
-			if (mtrr_enabled()) {
+			if (get_mtrr_state()) {
 				memory_caching_control |= CACHE_MTRR | CACHE_PAT;
 				changed_by_mtrr_cleanup = mtrr_cleanup(phys_addr);
 				cache_cpu_init();
+			} else {
+				mtrr_if = NULL;
 			}
 		}
 	}