hack in a debug output in freeinitmem

c-sky · Jan 18, 2022 · a8a0c8f014166b1e95e223240632fd0baac50ea7 · a8a0c8f
1 parent 2894557
commit a8a0c8f014166b1e95e223240632fd0baac50ea7
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Showing 2 changed files with 13 additions and 0 deletions.
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
@@ -320,6 +320,14 @@ subsys_initcall(topology_init);
 
 void free_initmem(void)
 {
+	unsigned long prot_val = pgprot_val(PAGE_KERNEL);
+
+printk("%s: _PAGE_KERNEL-orig: 0x%lx\n", __func__, prot_val);
+	ALT_THEAD_PMA(prot_val);
+printk("%s: _PAGE_KERNEL: 0x%lx\n", __func__, prot_val);
+printk("%s: _PAGE_IO: 0x%lx\n", __func__, _PAGE_IO);
+printk("%s: _PAGE_NOCACHE: 0x%lx\n", __func__, _PAGE_NOCACHE);
+
 	if (IS_ENABLED(CONFIG_STRICT_KERNEL_RWX))
 		set_kernel_memory(lm_alias(__init_begin), lm_alias(__init_end),
 				  IS_ENABLED(CONFIG_64BIT) ?

diff --git a/kernel/locking/locktorture.c b/kernel/locking/locktorture.c
@@ -914,6 +914,11 @@ static int __init lock_torture_init(void)
 		&percpu_rwsem_lock_ops,
 	};
 
+
+printk("%s: -----> %llx\n", __func__, _PAGE_MTMASK);
+
+
+return -EINVAL;
 	if (!torture_init_begin(torture_type, verbose))
 		return -EBUSY;