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[bpf-next,v1,2/4] bpf: __bpf_fastcall for bpf_get_smp_processor_id in uapi

Message ID 20240916091712.2929279-3-eddyz87@gmail.com (mailing list archive)
State New
Delegated to: BPF
Headers show
Series 'bpf_fastcall' attribute in vmlinux.h and bpf_helper_defs.h | expand

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Commit Message

Eduard Zingerman Sept. 16, 2024, 9:17 a.m. UTC 
Since [1] kernel supports __bpf_fastcall attribute for helper function
bpf_get_smp_processor_id(). Update uapi definition for this helper in
order to have this attribute in the generated bpf_helper_defs.h

[1] commit 91b7fbf3936f ("bpf, x86, riscv, arm: no_caller_saved_registers for bpf_get_smp_processor_id()")

Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
---
 include/uapi/linux/bpf.h       | 2 ++
 tools/include/uapi/linux/bpf.h | 2 ++
 2 files changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index c3a5728db115..fd1f59c6d1de 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -1970,6 +1970,8 @@  union bpf_attr {
  * 		program.
  * 	Return
  * 		The SMP id of the processor running the program.
+ * 	Attributes
+ * 		__bpf_fastcall
  *
  * long bpf_skb_store_bytes(struct sk_buff *skb, u32 offset, const void *from, u32 len, u64 flags)
  * 	Description
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index f329ee44627a..22b041c81276 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -1970,6 +1970,8 @@  union bpf_attr {
  * 		program.
  * 	Return
  * 		The SMP id of the processor running the program.
+ * 	Attributes
+ * 		__bpf_fastcall
  *
  * long bpf_skb_store_bytes(struct sk_buff *skb, u32 offset, const void *from, u32 len, u64 flags)
  * 	Description