MIPS: Don't probe reserved EntryHi bits.

The patch that adds cpu_probe_vmbits is erroneously writing to reserved bit 12. Since we are really only probing high bits, don't write this bit with a one. Signed-off-by: David Daney <[email protected]> To: [email protected] Cc: Guenter Roeck <[email protected]> Patchwork: http://patchwork.linux-mips.org/patch/949/ Acked-by: Guenter Roeck <[email protected]> Signed-off-by: Ralf Baechle <[email protected]>
chewitt · Feb 10, 2010 · 5b7efa8 · 5b7efa8
1 parent c2d5b5e
commit 5b7efa8
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
@@ -287,9 +287,9 @@ static inline int __cpu_has_fpu(void)
 static inline void cpu_probe_vmbits(struct cpuinfo_mips *c)
 {
 #ifdef __NEED_VMBITS_PROBE
-	write_c0_entryhi(0x3ffffffffffff000ULL);
+	write_c0_entryhi(0x3fffffffffffe000ULL);
 	back_to_back_c0_hazard();
-	c->vmbits = fls64(read_c0_entryhi() & 0x3ffffffffffff000ULL);
+	c->vmbits = fls64(read_c0_entryhi() & 0x3fffffffffffe000ULL);
 #endif
 }