mm: vmap: decrease wrps num [1/1]

PD#SWPL-6813 Problem: sys_ptrace watchpoint can't stop Solution: decrease wrps num Verify: u212 Change-Id: I18947bd91f8dd07cedeebbfca6d7ce01107c6a3e Signed-off-by: Hanjie Lin <hanjie.lin@amlogic.com>
hardkernel · Jun 20, 2019 · 899a9a4 · 899a9a4
1 parent 23afae0
commit 899a9a4
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/arch/arm64/include/asm/hw_breakpoint.h b/arch/arm64/include/asm/hw_breakpoint.h
@@ -159,9 +159,15 @@ static inline int get_num_brps(void)
 static inline int get_num_wrps(void)
 {
 	u64 dfr0 = read_system_reg(SYS_ID_AA64DFR0_EL1);
+#ifdef CONFIG_AMLOGIC_VMAP
+	return (1 +
+		cpuid_feature_extract_unsigned_field(dfr0,
+			ID_AA64DFR0_WRPS_SHIFT)) - 2;
+#else
 	return 1 +
 		cpuid_feature_extract_unsigned_field(dfr0,
 						ID_AA64DFR0_WRPS_SHIFT);
+#endif
 }
 
 #endif	/* __KERNEL__ */