csky: Fixup csky_pmu.max_period assignment

Mao Han · guoren83 · commit 3a09d8e2893b · 2019-09-30T10:26:33.000+08:00
The csky_pmu.max_period has type u64, and BIT() can only return
32 bits unsigned long on C-SKY. The initialization for max_period
will be incorrect when count_width is bigger than 32.

Use BIT_ULL()

Signed-off-by: Mao Han &lt;han_mao@c-sky.com&gt;
Signed-off-by: Guo Ren &lt;ren_guo@c-sky.com&gt;
diff --git a/arch/csky/kernel/perf_event.c b/arch/csky/kernel/perf_event.c
@@ -1306,7 +1306,7 @@ int csky_pmu_device_probe(struct platform_device *pdev,
 				 &csky_pmu.count_width)) {
 		csky_pmu.count_width = DEFAULT_COUNT_WIDTH;
 	}
-	csky_pmu.max_period = BIT(csky_pmu.count_width) - 1;
+	csky_pmu.max_period = BIT_ULL(csky_pmu.count_width) - 1;
 
 	csky_pmu.plat_device = pdev;
 

Original file line number	Diff line number	Diff line change
`@@ -1306,7 +1306,7 @@ int csky_pmu_device_probe(struct platform_device *pdev,`
`1306`	`1306`	`&csky_pmu.count_width)) {`
`1307`	`1307`	`csky_pmu.count_width = DEFAULT_COUNT_WIDTH;`
`1308`	`1308`	`}`
`1309`		`- csky_pmu.max_period = BIT(csky_pmu.count_width) - 1;`
	`1309`	`+ csky_pmu.max_period = BIT_ULL(csky_pmu.count_width) - 1;`
`1310`	`1310`
`1311`	`1311`	`csky_pmu.plat_device = pdev;`
`1312`	`1312`