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Sun, 16 Feb 2020 10:11:11 -0800 (PST) MIME-Version: 1.0 References: <20200109200733.GS3191@gate.crashing.org> <77a8bf25-6615-6c0a-56d4-eae7aa8a8f09@c-s.fr> <20200111113328.GX3191@gate.crashing.org> In-Reply-To: <20200111113328.GX3191@gate.crashing.org> From: Arnd Bergmann Date: Sun, 16 Feb 2020 19:10:55 +0100 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: Surprising code generated for vdso_read_begin() To: Segher Boessenkool X-Provags-ID: V03:K1:tBpFbQL3ZpMjX3TE4Hrgy0CJvZKdwSCJoHaiYG0xNqEOibwBihG cGIWAhdx/yIwbMcu9k7DI7SsSUC+gd4rfNc8JdkZkZiuYv3S0o7Ikr7ll+w4PC0aEpcKaol QgS/IphRPTHwfK9wZr6zcgLCLeyPDK0/R8jGg67GIWTYg79ejLy0bq1CZvsA58wG15AgXeM cPyu0CItCMDX9yd3k/Zag== X-UI-Out-Filterresults: notjunk:1;V03:K0:vQ1N75rrn7Q=:y6q9SYZz+eTscu6o4IboYb sxkVKCrM1vm4FwZUd+KVBQVJpAtRy6Z3U7HURBzDzsVrn5FO4FYelNkigoM+qFnJoOOt46SGZ sLI4B4hm6xAWG90HPo96KEZvejUCZGTTRXW/LO2bVMRdyP9MszKBPRzoaJgVPUZY5alTlPoVr awiM40RbMD4PLi+bOG7MP1a/GrcRoIYsrZQE/EYmzW4tUYDwNiZQDMgvkv/x9Mi6r43u4b1rz aS5xGV1CH7eLr98blQQliqWwm/g7wzz+cLWLy/rD+e5um1/5Tu3cvGy9mFCFrvIzA0JKnfhxr le5ETLGvuld+NRxXSNa6QuDVdUNwh2ktiQPrTueA+z0xJ0YIyenfZgTdynU1PdaDVXDsx7fWT YEHogcundS0n+W56Pep/GZkX9204n/KMVZpnjX5nuPdNwxq1WDrYOtu6ExRFysDv+np50pldg HecFfrC7x1Qbs8Ju85Ndk6XshmeM6dWw8u2URUpy8FCWkeyh8j/jtxkVJulSw8ZSxGBFhZ6CA L0cg2LD9owA1Lv4EKfd1BvPzabPDMMEeSMMoO3bN8Jdf5xA22kkOijz+qIVFY8yoJJpPT3hH6 uvV1CfhoqLjMGq0TPGfmRQRX0pupLUVqtOViK6xFuv3w5VS+VmZeG5SzIu8nsN60Hy7g1O5cM 3b/SKJ+oO1KSMtUxNcZOhCmvWKXv+5h1k49zNPtqtN/rjwxwoMg6tpPRX68JcZvt0IbAqr/6/ ZW290fffkh3xrJN5hWDS9eb8idrQ+FT5DS4GPx6gt8PI7Hlt5jczot0zp4MdL4/OZpQ9D0aln mFBg21wlMF+EtWrp9B/sfDokFXnKlnEdL3wIQ/fyj9kIToziyY= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200216_101117_642260_47F8328C X-CRM114-Status: GOOD ( 13.07 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Christophe Leroy , Benjamin Herrenschmidt , the arch/x86 maintainers , "linux-kernel@vger.kernel.org" , "open list:BROADCOM NVRAM DRIVER" , Paul Mackerras , Andy Lutomirski , Michael Ellerman , Thomas Gleixner , Vincenzo Frascino , linuxppc-dev , Linux ARM Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gU2F0LCBKYW4gMTEsIDIwMjAgYXQgMTI6MzMgUE0gU2VnaGVyIEJvZXNzZW5rb29sCjxzZWdo ZXJAa2VybmVsLmNyYXNoaW5nLm9yZz4gd3JvdGU6Cj4KPiBPbiBGcmksIEphbiAxMCwgMjAyMCBh dCAwNzo0NTo0NEFNICswMTAwLCBDaHJpc3RvcGhlIExlcm95IHdyb3RlOgo+ID4gTGUgMDkvMDEv MjAyMCDDoCAyMTowNywgU2VnaGVyIEJvZXNzZW5rb29sIGEgw6ljcml0IDoKPiA+ID5JdCBsb29r cyBsaWtlIHRoZSBjb21waWxlciBkaWQgbG9vcCBwZWVsaW5nLiAgV2hhdCBHQ0MgdmVyc2lvbiBp cyB0aGlzPwo+ID4gPlBsZWFzZSB0cnkgY3VycmVudCB0cnVuayAodG8gYmVjb21lIEdDQyAxMCks IG9yIGF0IGxlYXN0IEdDQyA5Pwo+ID4KPiA+IEl0IGlzIHdpdGggR0NDIDUuNQo+ID4KPiA+IGh0 dHBzOi8vbWlycm9ycy5lZGdlLmtlcm5lbC5vcmcvcHViL3Rvb2xzL2Nyb3NzdG9vbC8gZG9lc24n dCBoYXZlIG1vcmUKPiA+IHJlY2VudCB0aGFuIDguMQo+Cj4gQXJuZCwgY2FuIHlvdSB1cGRhdGUg dGhlIHRvb2xzPyAgV2UgYXJlIGF0IDguMyBhbmQgOS4yIG5vdyA6LSkgIE9yIGlzCj4gdGhpcyBo YXJkIGFuZC9vciBwYWluZnVsIHRvIGRvPwoKVG8gZm9sbG93IHVwIG9uIHRoaXMgb2xkZXIgdGhy ZWFkLCBJIGhhdmUgbm93IHVwbG9hZGVkIDYuNSwgNy41LCA4LjMgYW5kIDkuMgpiaW5hcmllcywg YXMgd2VsbCBhcyBhIHJlY2VudCAxMC4wIHNuYXBzaG90LgoKSSBob3BlIHRoZXNlIHdvcmssIGxl dCBtZSBrbm93IGlmIHRoZXJlIGFyZSBwcm9ibGVtcy4KCiAgICAgICBBcm5kCgpfX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1hcm0ta2VybmVsIG1h aWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVsQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xp c3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1hcm0ta2VybmVsCg==