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Merge "mm: cma: restrict base_pfn exposure"

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qctecmdr 2019-11-11 00:28:29 -08:00 committed by Gerrit - the friendly Code Review server
commit 4537f75a8b
1 changed files with 12 additions and 7 deletions
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19
mm/cma_debug.c
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@ -26,12 +26,18 @@ static struct dentry *cma_debugfs_root;
static int cma_debugfs_get(void *data, u64 *val)
{
unsigned long *p = data;
int ret = -EPERM;
*val = *p;
if (kptr_restrict == 0) {
*val = *p;
ret = 0;
} else {
*val = 0;
}
return 0;
return ret;
}
DEFINE_SIMPLE_ATTRIBUTE(cma_debugfs_fops, cma_debugfs_get, NULL, "%llu\n");
DEFINE_SIMPLE_ATTRIBUTE(cma_debugfs_fops, cma_debugfs_get, NULL, "0x%lx\n");
static int cma_used_get(void *data, u64 *val)
{
@ -190,10 +196,9 @@ static void cma_debugfs_add_one(struct cma *cma, int idx)
debugfs_create_file("base_pfn", S_IRUGO, tmp,
&cma->base_pfn, &cma_debugfs_fops);
debugfs_create_file("count", S_IRUGO, tmp,
&cma->count, &cma_debugfs_fops);
debugfs_create_file("order_per_bit", S_IRUGO, tmp,
&cma->order_per_bit, &cma_debugfs_fops);
debugfs_create_ulong("count", 0444, tmp, &cma->count);
debugfs_create_u32("order_per_bit", 0444, tmp,
(u32 *)&cma->order_per_bit);
debugfs_create_file("used", S_IRUGO, tmp, cma, &cma_used_fops);
debugfs_create_file("maxchunk", S_IRUGO, tmp, cma, &cma_maxchunk_fops);