disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/include/linux/device_cgroup.h
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@@ -1,6 +1,5 @@
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 /* SPDX-License-Identifier: GPL-2.0 */
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 #include <linux/fs.h>
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-#include <linux/bpf-cgroup.h>
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 #define DEVCG_ACC_MKNOD 1
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 #define DEVCG_ACC_READ  2
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@@ -11,27 +10,10 @@
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 #define DEVCG_DEV_CHAR  2
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 #define DEVCG_DEV_ALL   4  /* this represents all devices */
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-#ifdef CONFIG_CGROUP_DEVICE
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-extern int __devcgroup_check_permission(short type, u32 major, u32 minor,
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-					short access);
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-#else
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-static inline int __devcgroup_check_permission(short type, u32 major, u32 minor,
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-					       short access)
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-{ return 0; }
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-#endif
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 #if defined(CONFIG_CGROUP_DEVICE) || defined(CONFIG_CGROUP_BPF)
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-static inline int devcgroup_check_permission(short type, u32 major, u32 minor,
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-					     short access)
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-{
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-	int rc = BPF_CGROUP_RUN_PROG_DEVICE_CGROUP(type, major, minor, access);
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-
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-	if (rc)
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-		return -EPERM;
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-
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-	return __devcgroup_check_permission(type, major, minor, access);
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-}
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-
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+int devcgroup_check_permission(short type, u32 major, u32 minor,
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+			       short access);
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 static inline int devcgroup_inode_permission(struct inode *inode, int mask)
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 {
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 	short type, access = 0;
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@@ -62,6 +44,9 @@
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 	if (!S_ISBLK(mode) && !S_ISCHR(mode))
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 		return 0;
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+	if (S_ISCHR(mode) && dev == WHITEOUT_DEV)
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+		return 0;
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+
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 	if (S_ISBLK(mode))
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 		type = DEVCG_DEV_BLOCK;
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 	else
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@@ -72,6 +57,9 @@
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 }
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 #else
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+static inline int devcgroup_check_permission(short type, u32 major, u32 minor,
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+			       short access)
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+{ return 0; }
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 static inline int devcgroup_inode_permission(struct inode *inode, int mask)
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 { return 0; }
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 static inline int devcgroup_inode_mknod(int mode, dev_t dev)