arm64: cpufeature: Export symbol read_sanitised_ftr_reg()

Jean-Philippe Brucker · willdeacon · commit 6f3c4afae980 · 2020-09-28T22:22:37.000+01:00
The SMMUv3 driver would like to read the MMFR0 PARANGE field in order to share CPU page tables with devices. Allow the driver to be built as module by exporting the read_sanitized_ftr_reg() cpufeature symbol. Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com> Link: https://lore.kernel.org/r/20200918101852.582559-7-jean-philippe@linaro.org Signed-off-by: Will Deacon <will@kernel.org>
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
@@ -1111,6 +1111,7 @@ u64 read_sanitised_ftr_reg(u32 id)
 		return 0;
 	return regp->sys_val;
 }
+EXPORT_SYMBOL_GPL(read_sanitised_ftr_reg);
 
 #define read_sysreg_case(r)	\
 	case r:		return read_sysreg_s(r)

Original file line number	Diff line number	Diff line change
`@@ -1111,6 +1111,7 @@ u64 read_sanitised_ftr_reg(u32 id)`
`1111`	`1111`	`return 0;`
`1112`	`1112`	`return regp->sys_val;`
`1113`	`1113`	`}`
	`1114`	`+EXPORT_SYMBOL_GPL(read_sanitised_ftr_reg);`
`1114`	`1115`
`1115`	`1116`	`#define read_sysreg_case(r) \`
`1116`	`1117`	`case r: return read_sysreg_s(r)`