From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BF43232FA11 for ; Thu, 20 Nov 2025 22:04:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763676272; cv=none; b=dZJPYrTnGdbA6pKWE+uHCM8XNpmcRdXh9oEAkVaZSqGKlJ/jjy2dPt71SG/JA0qUPCZ8wqHvpNXwzLwZ9cXCjpKUgTLVLbmoPZulcvuvaw5rvl374AA3Y8jLsqWrBbG4nrLSAxg0vh9KH+Bo6P8W9ZNaWhsAOrK6mBRoIcZBCPc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763676272; c=relaxed/simple; bh=/GZ4N+Fi80FxhPADkqbQ4UmCpNXZMmBgA9JdsJvVFqI=; h=Date:To:From:Subject:Message-Id; b=m4VlB76ctjWIsxeKWwnFAJgIQZRIJGWsfq1Yg8q9Cigb9ZBwCilNJX9+WDDZ39shY9lNXlcHCvfk+o6JGMzEPeyWKZTWqri5xZ/oZs70kRaaVUpDtGclnCPBy/Omfs1RVff7XGyqGELDtR7y0/uvrNOXg1PIqJai3hFXCK/KWeo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=xP6V29SX; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="xP6V29SX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 41519C4CEF1; Thu, 20 Nov 2025 22:04:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1763676272; bh=/GZ4N+Fi80FxhPADkqbQ4UmCpNXZMmBgA9JdsJvVFqI=; h=Date:To:From:Subject:From; b=xP6V29SXdU+MQRZHtnrPeCODSUXRNj+jXWwRVk53Vyz4OVIz0NU820Dcc89KsY58K fct80DFyw/cRudX8Tym3Z5ule/zOUKJh7QQhgbJPpb5A2mjlWpn60PAvyrayksryJa kPUkPqH+AaHDLBZw7Q3m/xfvxk3mmNSEGz8L3EDw= Date: Thu, 20 Nov 2025 14:04:31 -0800 To: mm-commits@vger.kernel.org,u.kleine-koenig@baylibre.com,tglx@linutronix.de,peterz@infradead.org,oleg@redhat.com,npitre@baylibre.com,mingo@redhat.com,lirongqing@baidu.com,hpa@zytor.com,bp@alien8.de,biju.das.jz@bp.renesas.com,axboe@kernel.dk,david.laight.linux@gmail.com,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-nonmm-stable] lib-test_mul_u64_u64_div_u64-test-the-32bit-code-on-64bit.patch removed from -mm tree Message-Id: <20251120220432.41519C4CEF1@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: lib: test_mul_u64_u64_div_u64(): test the 32bit code on 64bit has been removed from the -mm tree. Its filename was lib-test_mul_u64_u64_div_u64-test-the-32bit-code-on-64bit.patch This patch was dropped because it was merged into the mm-nonmm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: David Laight Subject: lib: test_mul_u64_u64_div_u64(): test the 32bit code on 64bit Date: Wed, 5 Nov 2025 20:10:35 +0000 There are slight differences in the mul_u64_add_u64_div_u64() code between 32bit and 64bit systems. Compile and test the 32bit version on 64bit hosts for better test coverage. Link: https://lkml.kernel.org/r/20251105201035.64043-10-david.laight.linux@gmail.com Signed-off-by: David Laight Reviewed-by: Nicolas Pitre Cc: Biju Das Cc: Borislav Betkov Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Jens Axboe Cc: Li RongQing Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: Thomas Gleinxer Cc: Uwe Kleine-König Signed-off-by: Andrew Morton --- lib/math/test_mul_u64_u64_div_u64.c | 29 ++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) --- a/lib/math/test_mul_u64_u64_div_u64.c~lib-test_mul_u64_u64_div_u64-test-the-32bit-code-on-64bit +++ a/lib/math/test_mul_u64_u64_div_u64.c @@ -74,6 +74,10 @@ done */ static u64 test_mul_u64_add_u64_div_u64(u64 a, u64 b, u64 c, u64 d); +#if __LONG_WIDTH__ >= 64 +#define TEST_32BIT_DIV +static u64 test_mul_u64_add_u64_div_u64_32bit(u64 a, u64 b, u64 c, u64 d); +#endif static int __init test_run(unsigned int fn_no, const char *fn_name) { @@ -100,6 +104,12 @@ static int __init test_run(unsigned int result = test_mul_u64_add_u64_div_u64(a, b, 0, d); result_up = test_mul_u64_add_u64_div_u64(a, b, d - 1, d); break; +#ifdef TEST_32BIT_DIV + case 2: + result = test_mul_u64_add_u64_div_u64_32bit(a, b, 0, d); + result_up = test_mul_u64_add_u64_div_u64_32bit(a, b, d - 1, d); + break; +#endif } tests += 2; @@ -131,6 +141,10 @@ static int __init test_init(void) return -EINVAL; if (test_run(1, "test_mul_u64_u64_div_u64")) return -EINVAL; +#ifdef TEST_32BIT_DIV + if (test_run(2, "test_mul_u64_u64_div_u64_32bit")) + return -EINVAL; +#endif return 0; } @@ -153,6 +167,21 @@ static void __exit test_exit(void) #include "div64.c" +#ifdef TEST_32BIT_DIV +/* Recompile the generic code for 32bit long */ +#undef test_mul_u64_add_u64_div_u64 +#define test_mul_u64_add_u64_div_u64 test_mul_u64_add_u64_div_u64_32bit +#undef BITS_PER_ITER +#define BITS_PER_ITER 16 + +#define mul_u64_u64_add_u64 mul_u64_u64_add_u64_32bit +#undef mul_u64_long_add_u64 +#undef add_u64_long +#undef mul_add + +#include "div64.c" +#endif + module_init(test_init); module_exit(test_exit); _ Patches currently in -mm which might be from david.laight.linux@gmail.com are