x86/tsc_msr: Use named struct initializers

Use named struct initializers for the freq_desc struct-s initialization
and change the "u8 msr_plat" to a "bool use_msr_plat" to make its meaning
more clear instead of relying on a comment to explain it.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20200223140610.59612-1-hdegoede@redhat.com

diff --git a/arch/x86/kernel/tsc_msr.c b/arch/x86/kernel/tsc_msr.c
index e0cbe4f..5fa41ac 100644 (file)
--- a/arch/x86/kernel/tsc_msr.c
+++ b/arch/x86/kernel/tsc_msr.c
@@ -22,10 +22,10 @@
  * read in MSR_PLATFORM_ID[12:8], otherwise in MSR_PERF_STAT[44:40].
  * Unfortunately some Intel Atom SoCs aren't quite compliant to this,
  * so we need manually differentiate SoC families. This is what the
- * field msr_plat does.
+ * field use_msr_plat does.
  */
 struct freq_desc {
-       u8 msr_plat;    /* 1: use MSR_PLATFORM_INFO, 0: MSR_IA32_PERF_STATUS */
+       bool use_msr_plat;
        u32 freqs[MAX_NUM_FREQS];
 };
 
@@ -35,31 +35,39 @@ struct freq_desc {
  * by MSR based on SDM.
  */
 static const struct freq_desc freq_desc_pnw = {
-       0, { 0, 0, 0, 0, 0, 99840, 0, 83200 }
+       .use_msr_plat = false,
+       .freqs = { 0, 0, 0, 0, 0, 99840, 0, 83200 },
 };
 
 static const struct freq_desc freq_desc_clv = {
-       0, { 0, 133200, 0, 0, 0, 99840, 0, 83200 }
+       .use_msr_plat = false,
+       .freqs = { 0, 133200, 0, 0, 0, 99840, 0, 83200 },
 };
 
 static const struct freq_desc freq_desc_byt = {
-       1, { 83300, 100000, 133300, 116700, 80000, 0, 0, 0 }
+       .use_msr_plat = true,
+       .freqs = { 83300, 100000, 133300, 116700, 80000, 0, 0, 0 },
 };
 
 static const struct freq_desc freq_desc_cht = {
-       1, { 83300, 100000, 133300, 116700, 80000, 93300, 90000, 88900, 87500 }
+       .use_msr_plat = true,
+       .freqs = { 83300, 100000, 133300, 116700, 80000, 93300, 90000,
+                  88900, 87500 },
 };
 
 static const struct freq_desc freq_desc_tng = {
-       1, { 0, 100000, 133300, 0, 0, 0, 0, 0 }
+       .use_msr_plat = true,
+       .freqs = { 0, 100000, 133300, 0, 0, 0, 0, 0 },
 };
 
 static const struct freq_desc freq_desc_ann = {
-       1, { 83300, 100000, 133300, 100000, 0, 0, 0, 0 }
+       .use_msr_plat = true,
+       .freqs = { 83300, 100000, 133300, 100000, 0, 0, 0, 0 },
 };
 
 static const struct freq_desc freq_desc_lgm = {
-       1, { 78000, 78000, 78000, 78000, 78000, 78000, 78000, 78000 }
+       .use_msr_plat = true,
+       .freqs = { 78000, 78000, 78000, 78000, 78000, 78000, 78000, 78000 },
 };
 
 static const struct x86_cpu_id tsc_msr_cpu_ids[] = {
@@ -91,7 +99,7 @@ unsigned long cpu_khz_from_msr(void)
                return 0;
 
        freq_desc = (struct freq_desc *)id->driver_data;
-       if (freq_desc->msr_plat) {
+       if (freq_desc->use_msr_plat) {
                rdmsr(MSR_PLATFORM_INFO, lo, hi);
                ratio = (lo >> 8) & 0xff;
        } else {