diff mbox series

[bpf-next,3/3] bpf,docs: Remove KF_KPTR_GET from documentation

Message ID 20230415103231.236063-4-void@manifault.com (mailing list archive)
State Superseded
Delegated to: BPF
Headers show
Series Remove KF_KPTR_GET kfunc flag | expand

Checks

Context Check Description
bpf/vmtest-bpf-next-VM_Test-1 success Logs for ShellCheck
bpf/vmtest-bpf-next-VM_Test-7 success Logs for set-matrix
bpf/vmtest-bpf-next-VM_Test-2 success Logs for build for aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-3 success Logs for build for aarch64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-5 success Logs for build for x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-6 success Logs for build for x86_64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-4 success Logs for build for s390x with gcc
bpf/vmtest-bpf-next-VM_Test-32 success Logs for test_verifier on aarch64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-34 success Logs for test_verifier on x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-35 success Logs for test_verifier on x86_64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-8 success Logs for test_maps on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-9 success Logs for test_maps on aarch64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-11 success Logs for test_maps on x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-12 success Logs for test_maps on x86_64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-13 success Logs for test_progs on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-14 success Logs for test_progs on aarch64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-16 fail Logs for test_progs on x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-17 fail Logs for test_progs on x86_64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-18 success Logs for test_progs_no_alu32 on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-19 success Logs for test_progs_no_alu32 on aarch64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-21 fail Logs for test_progs_no_alu32 on x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-22 fail Logs for test_progs_no_alu32 on x86_64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-23 success Logs for test_progs_no_alu32_parallel on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-24 success Logs for test_progs_no_alu32_parallel on aarch64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-25 success Logs for test_progs_no_alu32_parallel on x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-26 success Logs for test_progs_no_alu32_parallel on x86_64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-27 success Logs for test_progs_parallel on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-28 success Logs for test_progs_parallel on aarch64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-29 success Logs for test_progs_parallel on x86_64 with gcc
bpf/vmtest-bpf-next-VM_Test-30 success Logs for test_progs_parallel on x86_64 with llvm-16
bpf/vmtest-bpf-next-VM_Test-31 success Logs for test_verifier on aarch64 with gcc
bpf/vmtest-bpf-next-VM_Test-33 success Logs for test_verifier on s390x with gcc
bpf/vmtest-bpf-next-VM_Test-20 success Logs for test_progs_no_alu32 on s390x with gcc
bpf/vmtest-bpf-next-VM_Test-15 success Logs for test_progs on s390x with gcc
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for bpf-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 18 this patch: 18
netdev/cc_maintainers warning 2 maintainers not CCed: corbet@lwn.net linux-doc@vger.kernel.org
netdev/build_clang success Errors and warnings before: 18 this patch: 18
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 18 this patch: 18
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 56 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
bpf/vmtest-bpf-next-VM_Test-10 success Logs for test_maps on s390x with gcc
bpf/vmtest-bpf-next-PR fail merge-conflict

Commit Message

David Vernet April 15, 2023, 10:32 a.m. UTC 
A prior patch removed KF_KPTR_GET from the kernel. Now that it's no
longer accessible to kfunc authors, this patch removes it from the BPF
kfunc documentation.

Signed-off-by: David Vernet <void@manifault.com>
---
 Documentation/bpf/kfuncs.rst | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)
diff mbox series

Patch

diff --git a/Documentation/bpf/kfuncs.rst b/Documentation/bpf/kfuncs.rst
index 3b42cfe12437..ea2516374d92 100644
--- a/Documentation/bpf/kfuncs.rst
+++ b/Documentation/bpf/kfuncs.rst
@@ -184,16 +184,7 @@  in. All copies of the pointer being released are invalidated as a result of
 invoking kfunc with this flag. KF_RELEASE kfuncs automatically receive the
 protection afforded by the KF_TRUSTED_ARGS flag described below.
 
-2.4.4 KF_KPTR_GET flag
-----------------------
-
-The KF_KPTR_GET flag is used to indicate that the kfunc takes the first argument
-as a pointer to kptr, safely increments the refcount of the object it points to,
-and returns a reference to the user. The rest of the arguments may be normal
-arguments of a kfunc. The KF_KPTR_GET flag should be used in conjunction with
-KF_ACQUIRE and KF_RET_NULL flags.
-
-2.4.5 KF_TRUSTED_ARGS flag
+2.4.4 KF_TRUSTED_ARGS flag
 --------------------------
 
 The KF_TRUSTED_ARGS flag is used for kfuncs taking pointer arguments. It
@@ -205,7 +196,7 @@  exception described below).
 There are two types of pointers to kernel objects which are considered "valid":
 
 1. Pointers which are passed as tracepoint or struct_ops callback arguments.
-2. Pointers which were returned from a KF_ACQUIRE or KF_KPTR_GET kfunc.
+2. Pointers which were returned from a KF_ACQUIRE kfunc.
 
 Pointers to non-BTF objects (e.g. scalar pointers) may also be passed to
 KF_TRUSTED_ARGS kfuncs, and may have a non-zero offset.
@@ -232,13 +223,13 @@  In other words, you must:
 2. Specify the type and name of the trusted nested field. This field must match
    the field in the original type definition exactly.
 
-2.4.6 KF_SLEEPABLE flag
+2.4.5 KF_SLEEPABLE flag
 -----------------------
 
 The KF_SLEEPABLE flag is used for kfuncs that may sleep. Such kfuncs can only
 be called by sleepable BPF programs (BPF_F_SLEEPABLE).
 
-2.4.7 KF_DESTRUCTIVE flag
+2.4.6 KF_DESTRUCTIVE flag
 --------------------------
 
 The KF_DESTRUCTIVE flag is used to indicate functions calling which is
@@ -247,7 +238,7 @@  rebooting or panicking. Due to this additional restrictions apply to these
 calls. At the moment they only require CAP_SYS_BOOT capability, but more can be
 added later.
 
-2.4.8 KF_RCU flag
+2.4.7 KF_RCU flag
 -----------------
 
 The KF_RCU flag is a weaker version of KF_TRUSTED_ARGS. The kfuncs marked with
@@ -260,7 +251,7 @@  also be KF_RET_NULL.
 
 .. _KF_deprecated_flag:
 
-2.4.9 KF_DEPRECATED flag
+2.4.8 KF_DEPRECATED flag
 ------------------------
 
 The KF_DEPRECATED flag is used for kfuncs which are scheduled to be