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Date: Mon, 28 Mar 2022 19:50:16 +0200 From: Roberto Sassu <roberto.sassu@...wei.com> To: <corbet@....net>, <viro@...iv.linux.org.uk>, <ast@...nel.org>, <daniel@...earbox.net>, <andrii@...nel.org>, <kpsingh@...nel.org>, <shuah@...nel.org>, <mcoquelin.stm32@...il.com>, <alexandre.torgue@...s.st.com>, <zohar@...ux.ibm.com> CC: <linux-doc@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>, <netdev@...r.kernel.org>, <bpf@...r.kernel.org>, <linux-kselftest@...r.kernel.org>, <linux-stm32@...md-mailman.stormreply.com>, <linux-arm-kernel@...ts.infradead.org>, <linux-integrity@...r.kernel.org>, <linux-security-module@...r.kernel.org>, <linux-kernel@...r.kernel.org>, Roberto Sassu <roberto.sassu@...wei.com> Subject: [PATCH 01/18] bpf: Export bpf_link_inc() In the upcoming patches, populate_bpffs() will not have visibility anymore on the links and maps to be pinned (to avoid the limitation of the 'objs' fixed-size array), but the eBPF-program-specific preload method will directly do the pinning and increase/decrease the reference count. Since the preload method can be implemented in a kernel module, also bpf_link_inc(), before called by populate_bpffs(), should be exported. Thus, export bpf_link_inc(). Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com> --- kernel/bpf/syscall.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index cdaa1152436a..8ffe342545c3 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -2459,6 +2459,7 @@ void bpf_link_inc(struct bpf_link *link) { atomic64_inc(&link->refcnt); } +EXPORT_SYMBOL_GPL(bpf_link_inc); /* bpf_link_free is guaranteed to be called from process context */ static void bpf_link_free(struct bpf_link *link) -- 2.32.0
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