From nobody Thu Apr 2 20:51:38 2026 Received: from mail-wm1-f74.google.com (mail-wm1-f74.google.com [209.85.128.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 485993A782E for ; Thu, 26 Mar 2026 21:25:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.74 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774560330; cv=none; b=hgLIMCgVof173/zUDTtyoF29SiiGsLJbg6dz0GGuOmkX01AWo/mE/AtOY5m1nIIm4kxfXB2a/m9NqN+Xf9dzleif+9Rt8SgdnjfkzW+afH3bt1S/Rm7HZf1IKI1gGxIlQgMI/fpNBpHBj0+Aj7DMzWZJIixvUJCfwNT39lID+KE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774560330; c=relaxed/simple; bh=IMqZKd1uN1FnLrufR1Vtu+d5jfNCK7QjuAG3cXhKCg8=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=lW/C8kbZsQc8T4AHb4G61Z63hC5rgP/jAzWSprpxW4L4Lwd7pu8Gn64ybnJr2KODk3KpSYsK+eMKOUkXoLUn1dgv9r30BjTAh297bPRbnGnbvX7+rzuTZvFiasATT5W7yqwCj8QGFO7yLb70xM2zT0zlPmKJk+FLgcGLq751FBc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--sidnayyar.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=NJbP2TmX; arc=none smtp.client-ip=209.85.128.74 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--sidnayyar.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="NJbP2TmX" Received: by mail-wm1-f74.google.com with SMTP id 5b1f17b1804b1-48531e8ae62so10819625e9.3 for ; Thu, 26 Mar 2026 14:25:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1774560327; x=1775165127; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=woqFHYkUrW1f2z9oyqhnpwQO2sR6jhXkFvm21NeDZng=; b=NJbP2TmXX1PaPlaltakZh7+M/KZt9H62AzEfr18yZhzga8pSxsM+cNSkqWqjDPCUHh 8GKUI3xp5Z42YY4+ospEieiHSd/N0g4HbUjRsG2O3yyGlHwnvkktUL2ap3PXX+Op0YBs DQUOUzmv8QYGghzA5n9KWoN+v2mruxNb+yio8y3aS9bx8BfWHxq/bAEuzWI1w0p8L48C tecCvtR/P/ClNrpVwTYqcWCMorOD4NX8JqiXoyxr8t9NUZwtqqRhH/7/Tvrys6XlMJJr 37Pzr2Uc4VyE508UHa4OfP01ahGBWKf2PHkOodVfDO9DYtrLq850IN5j4muw2zNmuWZl UsMg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774560327; x=1775165127; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=woqFHYkUrW1f2z9oyqhnpwQO2sR6jhXkFvm21NeDZng=; b=eQkF877GX0GBpb7kkjnOHDD+wfcGwt8pRt39YKdm5j7W3Wab041wEj6pLJAap8jucr eH0tJolmFr6qzXmbb/SMeqYka00fiIjBK/gQqsSLc+PE3yysmi4m5Auapc3EJ80NRY1g 64uGaGZIS2T461i2xbkFlVippFslaqrCz0Dso/Ss3F/L5m7qLDw1jMtIx6bqHbHRiUVm f2TOjSQa/FgDd3IhGVyb+XvzpiR3u+JgOMha94oJLc8P5yFMM47sQttWcaPkMxVYVdKC 2WR/kexrkrava9qb74UB74iNpqVRiQnEBO9EfoQp4Dps0iJYiIcuxKKHbViknMvE0cAP AlNg== X-Forwarded-Encrypted: i=1; AJvYcCVSZ45TzCSP9WZfoOHZ8bnNzjmMjhX25TFRCAlG63g6oApCSuv7OFdLWv7ziz6qUW8wNnrGP5GAp4lFXUQ=@vger.kernel.org X-Gm-Message-State: AOJu0YwjCghZzDXw/PK80WvDHGZQN5VtHP0z3IMLMPx50bReMoG63ts/ jIyYvD0j/8LU6RsoDchEQ8tlApFqPDT/OGm3J0dXHos3hhI4QIYw3lCc7gjv1Von+7zHt301dL2 QNm19aN352F6wWQiU0Q== X-Received: from wmf24.prod.google.com ([2002:a05:600c:2298:b0:483:80e5:6e03]) (user=sidnayyar job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:6487:b0:487:1c2:6a4c with SMTP id 5b1f17b1804b1-48727d6790dmr3401815e9.4.1774560326661; Thu, 26 Mar 2026 14:25:26 -0700 (PDT) Date: Thu, 26 Mar 2026 21:25:04 +0000 In-Reply-To: <20260326-kflagstab-v5-0-fa0796fe88d9@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260326-kflagstab-v5-0-fa0796fe88d9@google.com> X-Mailer: b4 0.14.3 Message-ID: <20260326-kflagstab-v5-3-fa0796fe88d9@google.com> Subject: [PATCH v5 3/7] module: populate kflagstab in modpost From: Siddharth Nayyar To: Luis Chamberlain , Petr Pavlu , Daniel Gomez , Sami Tolvanen , Aaron Tomlin , Arnd Bergmann , Nathan Chancellor , Nicolas Schier , Jonathan Corbet , Shuah Khan Cc: linux-modules@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-doc@vger.kernel.org, Siddharth Nayyar , maennich@google.com, gprocida@google.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable This patch adds the ability to create entries for kernel symbol flag bitsets in kflagstab. Modpost populates only the GPL-only flag for now. Signed-off-by: Siddharth Nayyar Reviewed-by: Petr Pavlu --- include/linux/export-internal.h | 7 +++++++ scripts/mod/modpost.c | 8 ++++++++ 2 files changed, 15 insertions(+) diff --git a/include/linux/export-internal.h b/include/linux/export-interna= l.h index d445705ac13c..4123c7592404 100644 --- a/include/linux/export-internal.h +++ b/include/linux/export-internal.h @@ -69,4 +69,11 @@ ".long " #crc "\n" \ ".previous" "\n") =20 +#define SYMBOL_FLAGS(sym, flags) \ + asm(" .section \"___kflagstab+" #sym "\",\"a\"" "\n" \ + "__flags_" #sym ":" "\n" \ + " .byte " #flags "\n" \ + " .previous" "\n" \ + ) + #endif /* __LINUX_EXPORT_INTERNAL_H__ */ diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 0c25b5ad497b..1d721fe67caf 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -244,6 +244,11 @@ static struct symbol *alloc_symbol(const char *name) return s; } =20 +static uint8_t get_symbol_flags(const struct symbol *sym) +{ + return sym->is_gpl_only ? KSYM_FLAG_GPL_ONLY : 0; +} + /* For the hash of exported symbols */ static void hash_add_symbol(struct symbol *sym) { @@ -1874,6 +1879,9 @@ static void add_exported_symbols(struct buffer *buf, = struct module *mod) buf_printf(buf, "KSYMTAB_%s(%s, \"%s\", \"%s\");\n", sym->is_func ? "FUNC" : "DATA", sym->name, sym->is_gpl_only ? "_gpl" : "", sym->namespace); + + buf_printf(buf, "SYMBOL_FLAGS(%s, 0x%02x);\n", + sym->name, get_symbol_flags(sym)); } =20 if (!modversions) --=20 2.53.0.1018.g2bb0e51243-goog