Commit 213a6952 authored by Menglong Dong's avatar Menglong Dong Committed by Andrii Nakryiko
Browse files

bpf: Replace the document for PTR_TO_BTF_ID_OR_NULL 



Commit c25b2ae1 ("bpf: Replace PTR_TO_XXX_OR_NULL with PTR_TO_XXX |
PTR_MAYBE_NULL") moved the fields around and misplaced the
documentation for "PTR_TO_BTF_ID_OR_NULL". So, let's replace it in the
proper place.

Signed-off-by: default avatarMenglong Dong <dongml2@chinatelecom.cn>
Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20241111124911.1436911-1-dongml2@chinatelecom.cn
parent 4b153542

include/linux/bpf.h

+4 −4
Original line number Diff line number Diff line
@@ -932,10 +932,6 @@ enum bpf_reg_type { 
	 * additional context, assume the value is non-null.

	 */

	PTR_TO_BTF_ID,

	/* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not

	 * been checked for null. Used primarily to inform the verifier

	 * an explicit null check is required for this struct.

	 */

	PTR_TO_MEM,		 /* reg points to valid memory region */

	PTR_TO_ARENA,

	PTR_TO_BUF,		 /* reg points to a read/write buffer */
@@ -948,6 +944,10 @@ enum bpf_reg_type { 
	PTR_TO_SOCKET_OR_NULL		= PTR_MAYBE_NULL | PTR_TO_SOCKET,

	PTR_TO_SOCK_COMMON_OR_NULL	= PTR_MAYBE_NULL | PTR_TO_SOCK_COMMON,

	PTR_TO_TCP_SOCK_OR_NULL		= PTR_MAYBE_NULL | PTR_TO_TCP_SOCK,

	/* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not

	 * been checked for null. Used primarily to inform the verifier

	 * an explicit null check is required for this struct.

	 */

	PTR_TO_BTF_ID_OR_NULL		= PTR_MAYBE_NULL | PTR_TO_BTF_ID,



	/* This must be the last entry. Its purpose is to ensure the enum is