MIPS: cpu-probe: Avoid probing FPU when CONFIG_MIPS_FP_SUPPORT=n
When CONFIG_MIPS_FP_SUPPORT=n we don't support floating point so there's
no point in attempting to detect an FPU. Avoid doing so.
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/21021/
Cc: linux-mips@linux-mips.org
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index d535fc7..71dcef8 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -36,6 +36,8 @@
unsigned int elf_hwcap __read_mostly;
EXPORT_SYMBOL_GPL(elf_hwcap);
+#ifdef CONFIG_MIPS_FP_SUPPORT
+
/*
* Get the FPU Implementation/Revision.
*/
@@ -58,19 +60,6 @@ static inline int __cpu_has_fpu(void)
return (cpu_get_fpu_id() & FPIR_IMP_MASK) != FPIR_IMP_NONE;
}
-static inline unsigned long cpu_get_msa_id(void)
-{
- unsigned long status, msa_id;
-
- status = read_c0_status();
- __enable_fpu(FPU_64BIT);
- enable_msa();
- msa_id = read_msa_ir();
- disable_msa();
- write_c0_status(status);
- return msa_id;
-}
-
/*
* Determine the FCSR mask for FPU hardware.
*/
@@ -326,6 +315,45 @@ static int __init fpu_disable(char *s)
__setup("nofpu", fpu_disable);
+#else /* !CONFIG_MIPS_FP_SUPPORT */
+
+#define mips_fpu_disabled 1
+
+static inline unsigned long cpu_get_fpu_id(void)
+{
+ return FPIR_IMP_NONE;
+}
+
+static inline int __cpu_has_fpu(void)
+{
+ return 0;
+}
+
+static void cpu_set_fpu_opts(struct cpuinfo_mips *c)
+{
+ /* no-op */
+}
+
+static void cpu_set_nofpu_opts(struct cpuinfo_mips *c)
+{
+ /* no-op */
+}
+
+#endif /* CONFIG_MIPS_FP_SUPPORT */
+
+static inline unsigned long cpu_get_msa_id(void)
+{
+ unsigned long status, msa_id;
+
+ status = read_c0_status();
+ __enable_fpu(FPU_64BIT);
+ enable_msa();
+ msa_id = read_msa_ir();
+ disable_msa();
+ write_c0_status(status);
+ return msa_id;
+}
+
static int mips_dsp_disabled;
static int __init dsp_disable(char *s)
