From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.7 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AFF33C004C9 for ; Tue, 7 May 2019 21:49:27 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7E5C4208C4 for ; Tue, 7 May 2019 21:49:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="clrvgDGA"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="IJ/47BT5" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7E5C4208C4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date: Message-ID:From:References:To:Subject:Reply-To:Content-ID:Content-Description :Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=1SzAbOukqyGq2FMc2baaEjiG8os28aFXZDdsi6GLDV0=; b=clrvgDGAV+xw1K c9Oc6oaSFS+qfEEeQtVSmXbMqPb3vSchngjdp4wcCWVdqgekviD4rieizviATcupxaTVhzEzuVHVJ fx94SF0t6rxOrkChB3GjJ8P1IEorEwqMF46SGJcoONtYNYb33iNYEL+vE41qWYEqeEE9LDdSFCJkm k7NKMh1P7iMbPHR43wHf7m7WvgDm4GhVLZN6jWcF3bsvqH48cpsLPmOXSTYNjlua8bWka3Z7bggAe UQRaah70nSZCoLVl3yAkdKayUfjJXyQmx3RqBWIU0rMXcGx7unBwGJkNlDhHo0U1U9u6Z3+Af3Gt1 x5RXca9/NJcimsdfbRPQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hO7xj-0005Eh-4g; Tue, 07 May 2019 21:49:23 +0000 Received: from mail-pf1-x441.google.com ([2607:f8b0:4864:20::441]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hO7xg-0005EO-5O for linux-arm-kernel@lists.infradead.org; Tue, 07 May 2019 21:49:21 +0000 Received: by mail-pf1-x441.google.com with SMTP id j11so9312674pff.13 for ; Tue, 07 May 2019 14:49:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:openpgp:autocrypt:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=MNXmqOJQAJof0zhxXE2E8ZtY5vE7SIeApoOEVP2KIPY=; b=IJ/47BT5wjxuMrJmS+QSbjNZtDkACxB9ZcOlVVQqttJFn8uYJzB/NddnJzVGVRxJPV nPFbYJUgFaO/jgGoa+5j80l6GwRpuVEsyeG+rFIwZnxT25xtSgmYG7U371DnhD3VpmYB U6UD2fA65peILKjpKCCKGV8yGRWzTDpiUG0l8AIwCdl7XvMHguJlEP0Orq17UhDl1uYS 3gBnR/otf+WTOdMMeJJbnrdxnhuDdt9ob5UgBfsiRvFOrLB52vZkU1/xLiy1SNIvz2a6 j/wR5RMzrg8BIr8++nDS0MpSJxa1Amdb6re+uxc++eLN6itVY6xcEvpGZfBur1nKNg7c Ozww== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:openpgp:autocrypt :message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=MNXmqOJQAJof0zhxXE2E8ZtY5vE7SIeApoOEVP2KIPY=; b=MoWK5MOaNFyqS8KMGyvgKqI3sMkeq3fdqw8ApNjNn+skz70eK+vnHNn67VA3NgqURI nbrxNe4XEet9yQSZ1BBPd8urqwLhrk3RY+rXmZ2dBp1jaj+yBkvDsy+hMEaWlVcPctkv PA7CLVo/iGr4KrEjDhYkb8N9bUL+mPqZqGWRI5a/U9Uj5MJPa59EyqAUDlzimCx/dKjs kjx8PQ1kEFYyJ8EPECnfbP7ECAuYCsQjEgzir/oIuVM3t56N8dZNvVCqFZG/GHpzTTKd 1QlAZPkRoKrY0XsM7lXZa4uEGGVo5CEFaOTNd0cMyIKYpz8z9M7CrglRHsPQL7KRIKXl We2g== X-Gm-Message-State: APjAAAUAcMNjjX0E+EL4NHNBvEDaQwyMzEy2iSaqOfA+a04tm0G4HvRM 9GutkwGXrfAA9H6/3LCXNzk= X-Google-Smtp-Source: APXvYqzE57ZUjJkVB4qLXv2F66a+UyTqqHVYCsSU1YS6xKgymKOIWxGT3r7/xLadpclo1kykJMgH4w== X-Received: by 2002:a65:49c7:: with SMTP id t7mr19051626pgs.324.1557265759006; Tue, 07 May 2019 14:49:19 -0700 (PDT) Received: from [10.67.49.27] ([192.19.223.250]) by smtp.googlemail.com with ESMTPSA id i129sm18472897pfc.163.2019.05.07.14.49.15 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 07 May 2019 14:49:17 -0700 (PDT) Subject: Re: [PATCH v2 1/3] kernel: Provide a __pow10() function To: Guenter Roeck , Florian Fainelli References: <20190507193504.28248-1-f.fainelli@gmail.com> <20190507193504.28248-2-f.fainelli@gmail.com> <20190507210654.GA4951@roeck-us.net> From: Florian Fainelli Openpgp: preference=signencrypt Autocrypt: addr=f.fainelli@gmail.com; prefer-encrypt=mutual; keydata= mQGiBEjPuBIRBACW9MxSJU9fvEOCTnRNqG/13rAGsj+vJqontvoDSNxRgmafP8d3nesnqPyR xGlkaOSDuu09rxuW+69Y2f1TzjFuGpBk4ysWOR85O2Nx8AJ6fYGCoeTbovrNlGT1M9obSFGQ X3IzRnWoqlfudjTO5TKoqkbOgpYqIo5n1QbEjCCwCwCg3DOH/4ug2AUUlcIT9/l3pGvoRJ0E AICDzi3l7pmC5IWn2n1mvP5247urtHFs/uusE827DDj3K8Upn2vYiOFMBhGsxAk6YKV6IP0d ZdWX6fqkJJlu9cSDvWtO1hXeHIfQIE/xcqvlRH783KrihLcsmnBqOiS6rJDO2x1eAgC8meAX SAgsrBhcgGl2Rl5gh/jkeA5ykwbxA/9u1eEuL70Qzt5APJmqVXR+kWvrqdBVPoUNy/tQ8mYc nzJJ63ng3tHhnwHXZOu8hL4nqwlYHRa9eeglXYhBqja4ZvIvCEqSmEukfivk+DlIgVoOAJbh qIWgvr3SIEuR6ayY3f5j0f2ejUMYlYYnKdiHXFlF9uXm1ELrb0YX4GMHz7QnRmxvcmlhbiBG YWluZWxsaSA8Zi5mYWluZWxsaUBnbWFpbC5jb20+iGYEExECACYCGyMGCwkIBwMCBBUCCAME FgIDAQIeAQIXgAUCVF/S8QUJHlwd3wAKCRBhV5kVtWN2DvCVAJ4u4/bPF4P3jxb4qEY8I2gS 6hG0gACffNWlqJ2T4wSSn+3o7CCZNd7SLSC5BA0ESM+4EhAQAL/o09boR9D3Vk1Tt7+gpYr3 WQ6hgYVON905q2ndEoA2J0dQxJNRw3snabHDDzQBAcqOvdi7YidfBVdKi0wxHhSuRBfuOppu pdXkb7zxuPQuSveCLqqZWRQ+Cc2QgF7SBqgznbe6Ngout5qXY5Dcagk9LqFNGhJQzUGHAsIs hap1f0B1PoUyUNeEInV98D8Xd/edM3mhO9nRpUXRK9Bvt4iEZUXGuVtZLT52nK6Wv2EZ1TiT OiqZlf1P+vxYLBx9eKmabPdm3yjalhY8yr1S1vL0gSA/C6W1o/TowdieF1rWN/MYHlkpyj9c Rpc281gAO0AP3V1G00YzBEdYyi0gaJbCEQnq8Vz1vDXFxHzyhgGz7umBsVKmYwZgA8DrrB0M oaP35wuGR3RJcaG30AnJpEDkBYHznI2apxdcuTPOHZyEilIRrBGzDwGtAhldzlBoBwE3Z3MY 31TOpACu1ZpNOMysZ6xiE35pWkwc0KYm4hJA5GFfmWSN6DniimW3pmdDIiw4Ifcx8b3mFrRO BbDIW13E51j9RjbO/nAaK9ndZ5LRO1B/8Fwat7bLzmsCiEXOJY7NNpIEpkoNoEUfCcZwmLrU +eOTPzaF6drw6ayewEi5yzPg3TAT6FV3oBsNg3xlwU0gPK3v6gYPX5w9+ovPZ1/qqNfOrbsE FRuiSVsZQ5s3AAMFD/9XjlnnVDh9GX/r/6hjmr4U9tEsM+VQXaVXqZuHKaSmojOLUCP/YVQo 7IiYaNssCS4FCPe4yrL4FJJfJAsbeyDykMN7wAnBcOkbZ9BPJPNCbqU6dowLOiy8AuTYQ48m vIyQ4Ijnb6GTrtxIUDQeOBNuQC/gyyx3nbL/lVlHbxr4tb6YkhkO6shjXhQh7nQb33FjGO4P WU11Nr9i/qoV8QCo12MQEo244RRA6VMud06y/E449rWZFSTwGqb0FS0seTcYNvxt8PB2izX+ HZA8SL54j479ubxhfuoTu5nXdtFYFj5Lj5x34LKPx7MpgAmj0H7SDhpFWF2FzcC1bjiW9mjW HaKaX23Awt97AqQZXegbfkJwX2Y53ufq8Np3e1542lh3/mpiGSilCsaTahEGrHK+lIusl6mz Joil+u3k01ofvJMK0ZdzGUZ/aPMZ16LofjFA+MNxWrZFrkYmiGdv+LG45zSlZyIvzSiG2lKy kuVag+IijCIom78P9jRtB1q1Q5lwZp2TLAJlz92DmFwBg1hyFzwDADjZ2nrDxKUiybXIgZp9 aU2d++ptEGCVJOfEW4qpWCCLPbOT7XBr+g/4H3qWbs3j/cDDq7LuVYIe+wchy/iXEJaQVeTC y5arMQorqTFWlEOgRA8OP47L9knl9i4xuR0euV6DChDrguup2aJVU4hPBBgRAgAPAhsMBQJU X9LxBQkeXB3fAAoJEGFXmRW1Y3YOj4UAn3nrFLPZekMeqX5aD/aq/dsbXSfyAKC45Go0YyxV HGuUuzv+GKZ6nsysJ7kCDQRXG8fwARAA6q/pqBi5PjHcOAUgk2/2LR5LjjesK50bCaD4JuNc YDhFR7Vs108diBtsho3w8WRd9viOqDrhLJTroVckkk74OY8r+3t1E0Dd4wHWHQZsAeUvOwDM PQMqTUBFuMi6ydzTZpFA2wBR9x6ofl8Ax+zaGBcFrRlQnhsuXLnM1uuvS39+pmzIjasZBP2H UPk5ifigXcpelKmj6iskP3c8QN6x6GjUSmYx+xUfs/GNVSU1XOZn61wgPDbgINJd/THGdqiO iJxCLuTMqlSsmh1+E1dSdfYkCb93R/0ZHvMKWlAx7MnaFgBfsG8FqNtZu3PCLfizyVYYjXbV WO1A23riZKqwrSJAATo5iTS65BuYxrFsFNPrf7TitM8E76BEBZk0OZBvZxMuOs6Z1qI8YKVK UrHVGFq3NbuPWCdRul9SX3VfOunr9Gv0GABnJ0ET+K7nspax0xqq7zgnM71QEaiaH17IFYGS sG34V7Wo3vyQzsk7qLf9Ajno0DhJ+VX43g8+AjxOMNVrGCt9RNXSBVpyv2AMTlWCdJ5KI6V4 KEzWM4HJm7QlNKE6RPoBxJVbSQLPd9St3h7mxLcne4l7NK9eNgNnneT7QZL8fL//s9K8Ns1W t60uQNYvbhKDG7+/yLcmJgjF74XkGvxCmTA1rW2bsUriM533nG9gAOUFQjURkwI8jvMAEQEA AYkCaAQYEQIACQUCVxvH8AIbAgIpCRBhV5kVtWN2DsFdIAQZAQIABgUCVxvH8AAKCRCH0Jac RAcHBIkHD/9nmfog7X2ZXMzL9ktT++7x+W/QBrSTCTmq8PK+69+INN1ZDOrY8uz6htfTLV9+ e2W6G8/7zIvODuHk7r+yQ585XbplgP0V5Xc8iBHdBgXbqnY5zBrcH+Q/oQ2STalEvaGHqNoD UGyLQ/fiKoLZTPMur57Fy1c9rTuKiSdMgnT0FPfWVDfpR2Ds0gpqWePlRuRGOoCln5GnREA/ 2MW2rWf+CO9kbIR+66j8b4RUJqIK3dWn9xbENh/aqxfonGTCZQ2zC4sLd25DQA4w1itPo+f5 V/SQxuhnlQkTOCdJ7b/mby/pNRz1lsLkjnXueLILj7gNjwTabZXYtL16z24qkDTI1x3g98R/ xunb3/fQwR8FY5/zRvXJq5us/nLvIvOmVwZFkwXc+AF+LSIajqQz9XbXeIP/BDjlBNXRZNdo dVuSU51ENcMcilPr2EUnqEAqeczsCGpnvRCLfVQeSZr2L9N4svNhhfPOEscYhhpHTh0VPyxI pPBNKq+byuYPMyk3nj814NKhImK0O4gTyCK9b+gZAVvQcYAXvSouCnTZeJRrNHJFTgTgu6E0 caxTGgc5zzQHeX67eMzrGomG3ZnIxmd1sAbgvJUDaD2GrYlulfwGWwWyTNbWRvMighVdPkSF 6XFgQaosWxkV0OELLy2N485YrTr2Uq64VKyxpncLh50e2RnyAJ9Za0Dx0yyp44iD1OvHtkEI M5kY0ACeNhCZJvZ5g4C2Lc9fcTHu8jxmEkI= Message-ID: Date: Tue, 7 May 2019 14:49:09 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <20190507210654.GA4951@roeck-us.net> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190507_144920_233401_B69E174D X-CRM114-Status: GOOD ( 19.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "open list:HARDWARE MONITORING" , Jean Delvare , linux-kernel@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, Sudeep Holla , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 5/7/19 2:06 PM, Guenter Roeck wrote: > On Tue, May 07, 2019 at 12:35:02PM -0700, Florian Fainelli wrote: >> Provide a simple macro that can return the value of 10 raised to a >> positive integer. We are going to use this in order to scale units from >> firmware to HWMON. >> >> Signed-off-by: Florian Fainelli >> --- >> include/linux/kernel.h | 11 +++++++++++ >> 1 file changed, 11 insertions(+) >> >> diff --git a/include/linux/kernel.h b/include/linux/kernel.h >> index 2d14e21c16c0..62fc8bd84bc9 100644 >> --- a/include/linux/kernel.h >> +++ b/include/linux/kernel.h >> @@ -294,6 +294,17 @@ static inline u32 reciprocal_scale(u32 val, u32 ep_ro) >> return (u32)(((u64) val * ep_ro) >> 32); >> } >> >> +/* Return in f the value of 10 raise to the power x */ >> +#define __pow10(x, f)( \ >> +{ \ >> + typeof(x) __x = abs(x); \ >> + f = 1; \ >> + while (__x--) \ >> + f *= 10; \ >> + f; \ >> +} \ >> +) > > Kind of unusual. I would have expected to use this like > f = __pow10(x); > ie without having to provide f as parameter. That would be much less > confusing. I assume this is to make the result type independent, but > I am not sure if that is worth the trouble. Correct, that was the intent here. > > Are there users outside the hwmon code ? If not, it might be simpler > to keep it there for now. There appears to be a few outside actually: drivers/acpi/sbs.c::battery_scale drivers/iio/common/hid-sensors/hid-sensor-attributes.c::pow_10 There could be others but those two came out as obvious candidates. Would you be okay with a local pow10 function within scmi-hwmon.c and a subsequent patch series providing a common function? -- Florian _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel