bpf: __bpf_fastcall for bpf_get_smp_processor_id in uapi

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 91b7fbf ("bpf, x86, riscv, arm: no_caller_saved_registers for bpf_get_smp_processor_id()") Signed-off-by: Eduard Zingerman <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected] Signed-off-by: Alexei Starovoitov <[email protected]>
omasanori · Oct 4, 2024 · 4f647a7 · 4f647a7
1 parent 48b13ca
commit 4f647a7
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diff --git 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
@@ -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