From: Alexei Starovoitov Date: Thu, 15 May 2025 00:48:57 +0000 (-0700) Subject: Merge branch 's390-bpf-remove-the-orig_call-null-check' X-Git-Tag: v6.16-rc1~131^2~21 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9325d53fe9adff354b6a93fda5f38c165947da0f;p=thirdparty%2Flinux.git Merge branch 's390-bpf-remove-the-orig_call-null-check' Ilya Leoshkevich says: ==================== I've been looking at fixing the tailcall_bpf2bpf_hierarchy failures on s390. One of the challenges is that when a BPF trampoline calls a BPF prog A, the prologue of A sets the tail call count to 0. Therefore it would be useful to know whether the trampoline is attached to some other BPF prog B, in which case A should be called using an offset equal to tail_call_start, bypassing the tail call count initialization. The trampoline attachment point is passed to trampoline functions via the orig_call variable. Unfortunately in the case of calculating the size of a struct_ops trampoline it's NULL, and I could not think of a good reason to have it this way. This series makes it always non-NULL. ==================== Link: https://patch.msgid.link/20250512221911.61314-1-iii@linux.ibm.com Signed-off-by: Alexei Starovoitov --- 9325d53fe9adff354b6a93fda5f38c165947da0f