From mboxrd@z Thu Jan 1 00:00:00 1970 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 2655C3DEAEB for ; Thu, 5 Mar 2026 16:54:33 +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=1772729674; cv=none; b=TuTSSoYCBjDMKzZu6zy7wpy4S5Zu6KQUPRaW4a5aB++kuY1DOtbs8RjOTIOaYdyk6XzGKJHNza0K5i4FBKnCB2q2J8qkBZu2gtSFOZyHHNFIFYTbqnrQmQ0ox9boE+amk17FIum6tvuvkFHWoE/7B2BmKSBK+Erde+0RALi38mI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772729674; c=relaxed/simple; bh=A4U/FoOHtW+MFUPt0VllbbGZtdckI6pJiFlzK0SEzrc=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=U15ZsEeONqEHV20GH9z8y4hyHqcWh629G2CTlZ1QMW8kcqgbtPOhzQcii3AMRjOnYM6Rg3VpByzIEEA5VKiLqbd7aH1Um/E4oFc9Uv+63KXeTnKCnDdv6BIiGnnS2Kzne0oNpaj1rir5gd//wp9UMJqhOs1UY24mYTClY90MkHc= 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=Bi3L4yXV; 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="Bi3L4yXV" Received: by mail-wm1-f74.google.com with SMTP id 5b1f17b1804b1-4837cee2e9bso64757425e9.3 for ; Thu, 05 Mar 2026 08:54:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1772729672; x=1773334472; 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=V+WoAPEi01xLPG9zvw+lWYQpkS4zZIu+aKoCdLedeNs=; b=Bi3L4yXVqBG+Qh7C94FVT0WOLx+982NH3J+gIK9Av7uuplqWJ9Oa07mJjjIkgA+0uB 97xbWBadoB0EZiAC6x+4EFkM8TT74n/46tIfORSfE9X0f0uSn7LgUNcbEvhjqk6byy7t VeMQiHGy/DrMdQDPxgX8fFtfj4ziLUX/Q6kScYxirUfBcojbqjQKUrlgNfJoZMoy5vOy dalvWwXK5YlU2pI3ZnlX291+Lg3CC8ZWHbJZEmW7gIz/ulalVH1NNMp85Y1nLW6k7A0T 3gV0DTY2xTMplfALUBKhDsr+RHmoZnBl+eclpjJAYs17jkPj7SP+Rchxz1rGn0+SXMzo WG1w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772729672; x=1773334472; 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=V+WoAPEi01xLPG9zvw+lWYQpkS4zZIu+aKoCdLedeNs=; b=sbIvmSAydtuu9vPf/gm1MiupEZ4logF7eiM8jKKoMfOAfS9pMdS1sIWjtnM47luQ14 PynR7598vwFXH9OE46yUqxTgtvUGySeL9WzaERbvPXbvlCNmlc8fSBubK5gOlMdeAH5g Zv7Eq1WB4VZSmJ6UUwSduWYGC2ezyYg55oeURt2ZX24oyUKfmKJby6DPnT7KGh+SzvRI DEOnJ90ZpyWAvn5t9Kmgrd+jk0oih1osp8auAan3jY9U3spsutDqDhNfgx1LZtUMUyxF J79U9tw662X4QGKp5mKDkuiT5av+tqpfaHLNo1BP3EZOReaBUxqS2eO6CyxTfdG1R2Fm gSLA== X-Forwarded-Encrypted: i=1; AJvYcCUjVay/oByKUju8zSCXvtnumscYzL1JwMm1GsW6HwOtpMp9u+JfJLifhOm8pFIDfl1L7AWaOtf+S6o=@vger.kernel.org X-Gm-Message-State: AOJu0YxtC/Oz5Uac/iZl1vsScVrZ8ritvr7PaGSLtz1uhGd1oXoWN7io kmm09fpuYhKQNAlc0aJ5Q/xa+ga8OMhYIWLeIoIPoNfLsB7pkP3V2GFhQ/vfJ8zrw3Etec5OsIG KQmgfDDWQA6eTtqPwpQ== X-Received: from wmbjv25.prod.google.com ([2002:a05:600c:5719:b0:480:6a27:9ec2]) (user=sidnayyar job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:529b:b0:47d:25ac:3a94 with SMTP id 5b1f17b1804b1-485198840ddmr115115695e9.17.1772729671507; Thu, 05 Mar 2026 08:54:31 -0800 (PST) Date: Thu, 05 Mar 2026 16:54:23 +0000 In-Reply-To: <20260305-kflagstab-v4-0-4fe6eea27e30@google.com> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260305-kflagstab-v4-0-4fe6eea27e30@google.com> X-Mailer: b4 0.14.3 Message-ID: <20260305-kflagstab-v4-3-4fe6eea27e30@google.com> Subject: [PATCH v4 3/8] modpost: populate kflagstab 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" 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 --- 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-internal.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") +#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; } +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)); } if (!modversions) -- 2.53.0.473.g4a7958ca14-goog