Thread (21 messages) 21 messages, 5 authors, 2026-01-17

Re: [PATCH v2 2/6] powerpc64/bpf: Support tailcalls with subprogs

From: Hari Bathini <hbathini@linux.ibm.com>
Date: 2026-01-17 10:23:59
Also in: bpf, linux-kselftest, lkml


On 14/01/26 5:14 pm, adubey@linux.ibm.com wrote:
From: Abhishek Dubey<redacted>

Enabling tailcalls with subprog combinations by referencing
method. The actual tailcall count is always maintained in the
tail_call_info variable present in the frame of main function
(also called entry function). The tail_call_info variables in
the frames of all other subprog contains reference to the
tail_call_info present in frame of main function.
I would rephrase:

"The tail_call_info variables in the frames of all other subprog
contains reference to the tail_call_info present in frame of
main function."

to:

"The tail_call_info field in the stack frame of subprogs contains
reference to the tail_call_info field in the stack frame of main
BPF program."

- Hari
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