From patchwork Tue Dec 30 23:41:17 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Glass X-Patchwork-Id: 1128 Return-Path: X-Original-To: u-boot-concept@u-boot.org Delivered-To: u-boot-concept@u-boot.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=u-boot.org; s=default; t=1767138284; bh=sL9QrN41XlD0a/QSUL9jyp7XOq9KbnO388fxn1pj1ss=; h=From:To:Date:In-Reply-To:References:CC:Subject:List-Id: List-Archive:List-Help:List-Owner:List-Post:List-Subscribe: List-Unsubscribe:From; b=g/+1maKBp/yjOXyR06n+vhrGxrkIiDNI1bPITjnAB3I70sfDWQ24X13z6dj3+2qoB CX6OJROJflQ0R/563kdpL2WguadpCcHTEaxN+ySFIYBaO6eJMPuCQlZR9hCe6s9dXm P/u0w+Q53DnGQfgo8qGYrIfqm2YrTxN7qkkQuVCk9YMAwfcKUCRODC/X8tpmNS0wxT ofOxmgIIB0qHO4ZPKFmGJ29DopTrSy8rPxeroNXv89Q9Nj+aeR4QlHEUUoY0/pToR1 aGMTRkbxPcZlDPb8TuASCq3vcINusKt6OWqPKUGWo5vmbK7FrzcNtH3oDXLzD+Sa/t TlbScFTRXt0Hw== Received: from localhost (localhost [127.0.0.1]) by mail.u-boot.org (Postfix) with ESMTP id 156F068F6F for ; Tue, 30 Dec 2025 16:44:44 -0700 (MST) X-Virus-Scanned: Debian amavis at Received: from mail.u-boot.org ([127.0.0.1]) by localhost (mail.u-boot.org [127.0.0.1]) (amavis, port 10024) with ESMTP id mm2JmbxT6MgK for ; Tue, 30 Dec 2025 16:44:44 -0700 (MST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=u-boot.org; s=default; t=1767138283; bh=sL9QrN41XlD0a/QSUL9jyp7XOq9KbnO388fxn1pj1ss=; h=From:To:Date:In-Reply-To:References:CC:Subject:List-Id: List-Archive:List-Help:List-Owner:List-Post:List-Subscribe: List-Unsubscribe:From; b=fuFi2216ZVr4TfOqJlbDEYaTR0QctA5jUVeqVgWBMpcCoTzIoIm5AUkI19I7dPGxp 6K2iyNMFyTPZQZxzpmPhlc1FN49OxQFTBQHi5TDTFtnI4qOq2qT8YgYo1zihAdWDNo WC/Zx85Ccf14LFqDhu20OznThKWTNMQcKKR9SDQzrwJ17smDEME7uVJ9RGoJTU+KhX GgssBZsJXzafwlgem5N+WAtKlHaUSagEujbnDAVSO0VO463tz/TaMDlPNzVS9pSBOD h6n4xtJO5VNH2bcu/7IrkyPhJDK8MgsUCkGWhgnntvExmNnL8O6hRuK9uo8oozN016 zWPP1bQyQJaNA== Received: from mail.u-boot.org (localhost [127.0.0.1]) by mail.u-boot.org (Postfix) with ESMTP id 36C4768F8E for ; Tue, 30 Dec 2025 16:44:43 -0700 (MST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=u-boot.org; s=default; t=1767138281; bh=KptjRZhQUgbbo+LoGT+dvqeW3pZ1FTVYPQAg7iaSj2k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sGkYeSUt2Ni11TMujISuJG8VdYIq2KVzsF+EaTi0qwFchO6zv6v9ZXQ5rhMpjfrHF QA9knbvomuScEmy0BTDuIhyclDDTxvTc7qlxCFsVR6jx45IlTBSk3hosCzK/UDfRO0 8qiBvaZC/QIE178j6SoNnoF0fArVBtda9ntreLbwVAq8sjnyoEsgqZyGRA0bz/lwsi YfC7Mym9Q1PYYxis+ViPrMkNi84m96+By/SBMMC7TRqe3AxQkWmBD1JSWZYKw2um18 tehIotKEJQPdQlxe12CBTfFwO0pHzGqQIoS/oi6/LyH0fPDmbVPEir6xWr7IgtIlWQ uTYmZwN7PPRNg== Received: from localhost (localhost [127.0.0.1]) by mail.u-boot.org (Postfix) with ESMTP id 740AB68F9A; Tue, 30 Dec 2025 16:44:41 -0700 (MST) X-Virus-Scanned: Debian amavis at Received: from mail.u-boot.org ([127.0.0.1]) by localhost (mail.u-boot.org [127.0.0.1]) (amavis, port 10026) with ESMTP id EDEcoSfhAQlp; Tue, 30 Dec 2025 16:44:41 -0700 (MST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=u-boot.org; s=default; t=1767138277; bh=m3MNrP7X+Bf3dBpiaNXpRl+SAEnXlyyUEffHaSLY6RA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Dd1scIUF5iqMdMDd8J8rdXcnnUNLbMPT3ft3tZimOtxrcZGk5jl15A7u3vvH15V5D zJmXO/qH3QbBoTphCPs/nKNeobKWyhKJSW1HxxrjwxwHdZPdP397tdyQ/E6DvDkfsT 5eJOhnY3961mASsvBjtfwa/3e1eX0B1DLIvtRPIZzyHDeAuwvMb8PYt1bFeuJPThv2 fTfXJPgXU35N037VKOE7HO31p4qc0qVGtHCL7fAMsL+4M/FCk6UZwPZ8CJgD+riEKo ZGkIX/VDVMFNb8gVWiFizMKu2mtRbstK4eSfc8GTsoYQTLyHROveibJ/rw/8q/xncz 64K5XGgBZ2vwQ== Received: from u-boot.org (unknown [73.34.74.121]) by mail.u-boot.org (Postfix) with ESMTPSA id 6FF0B68F9C; Tue, 30 Dec 2025 16:44:37 -0700 (MST) From: Simon Glass To: U-Boot Concept Date: Tue, 30 Dec 2025 16:41:17 -0700 Message-ID: <20251230234134.906477-6-sjg@u-boot.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251230234134.906477-1-sjg@u-boot.org> References: <20251230234134.906477-1-sjg@u-boot.org> MIME-Version: 1.0 Message-ID-Hash: 6OFDYMX4S76AZJYWB5D7CBVN56MSRHM2 X-Message-ID-Hash: 6OFDYMX4S76AZJYWB5D7CBVN56MSRHM2 X-MailFrom: sjg@u-boot.org X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: Simon Glass , "Claude Opus 4 . 5" X-Mailman-Version: 3.3.10 Precedence: list Subject: [Concept] [PATCH 05/15] ext4l: Implement little-endian bit operations List-Id: Discussion and patches related to U-Boot Concept Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Simon Glass The ext4 block allocator uses little-endian bit operations on block bitmaps. Implement these operations by wrapping the existing set/test/clear_bit() functions. Add find_next_zero_bit() to search for free blocks in bitmaps. Co-developed-by: Claude Opus 4.5 Signed-off-by: Simon Glass --- fs/ext4l/ext4_uboot.h | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/fs/ext4l/ext4_uboot.h b/fs/ext4l/ext4_uboot.h index 39bade68654..4ce98eeb7ed 100644 --- a/fs/ext4l/ext4_uboot.h +++ b/fs/ext4l/ext4_uboot.h @@ -349,13 +349,15 @@ struct buffer_head *sb_getblk(struct super_block *sb, sector_t block); * We implement them in interface.c for sandbox. */ -/* Little-endian bit operations */ -#define __set_bit_le(nr, addr) ((void)(nr), (void)(addr)) -#define test_bit_le(nr, addr) ({ (void)(nr); (void)(addr); 0; }) +/* Little-endian bit operations - use arch-provided find_next_zero_bit */ #define find_next_zero_bit_le(addr, size, offset) \ - ({ (void)(addr); (void)(size); (offset); }) -#define __test_and_clear_bit_le(nr, addr) ({ (void)(nr); (void)(addr); 0; }) -#define __test_and_set_bit_le(nr, addr) ({ (void)(nr); (void)(addr); 0; }) + find_next_zero_bit((void *)addr, size, offset) +#define __set_bit_le(nr, addr) set_bit(nr, addr) +#define test_bit_le(nr, addr) test_bit(nr, addr) +#define __test_and_clear_bit_le(nr, addr) \ + ({ int __old = test_bit(nr, addr); clear_bit(nr, addr); __old; }) +#define __test_and_set_bit_le(nr, addr) \ + ({ int __old = test_bit(nr, addr); set_bit(nr, addr); __old; }) /* KUNIT stub */ #define KUNIT_STATIC_STUB_REDIRECT(...) do { } while (0)