Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: [3.18,04/25] x86/MCE: Serialize sysfs changes From: Greg Kroah-Hartman Message-Id: <20180316152232.936014427@linuxfoundation.org> Date: Fri, 16 Mar 2018 16:22:51 +0100 To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Seunghun Han , Borislav Petkov , Thomas Gleixner , Tony Luck , linux-edac List-ID: My4xOC1zdGFibGUgcmV2aWV3IHBhdGNoLiAgSWYgYW55b25lIGhhcyBhbnkgb2JqZWN0aW9ucywg cGxlYXNlIGxldCBtZSBrbm93LgoKLS0tLS0tLS0tLS0tLS0tLS0tCgpGcm9tOiBTZXVuZ2h1biBI YW4gPGtrYW1hZ3VpQGdtYWlsLmNvbT4KCmNvbW1pdCBiM2I3YzQ3OTVjY2FiNWJlNzFmMDgwNzc0 YzQ1YmJiY2M3NWMyYWFmIHVwc3RyZWFtLgoKVGhlIGNoZWNrX2ludGVydmFsIGZpbGUgaW4KCiAg L3N5cy9kZXZpY2VzL3N5c3RlbS9tYWNoaW5lY2hlY2svbWFjaGluZWNoZWNrPGNwdSBudW1iZXI+ CgpkaXJlY3RvcnkgaXMgYSBnbG9iYWwgdGltZXIgdmFsdWUgZm9yIE1DRSBwb2xsaW5nLiBJZiBp dCBpcyBjaGFuZ2VkIGJ5IG9uZQpDUFUsIG1jZV9yZXN0YXJ0KCkgYnJvYWRjYXN0cyB0aGUgZXZl bnQgdG8gb3RoZXIgQ1BVcyB0byBkZWxldGUgYW5kIHJlc3RhcnQKdGhlIE1DRSBwb2xsaW5nIHRp bWVyIGFuZCBfX21jaGVja19jcHVfaW5pdF90aW1lcigpIHJlaW5pdGlhbGl6ZXMgdGhlCm1jZV90 aW1lciB2YXJpYWJsZS4KCklmIG1vcmUgdGhhbiBvbmUgQ1BVIHdyaXRlcyBhIHNwZWNpZmljIHZh bHVlIHRvIHRoZSBjaGVja19pbnRlcnZhbCBmaWxlCmNvbmN1cnJlbnRseSwgbWNlX3RpbWVyIGlz IG5vdCBwcm90ZWN0ZWQgZnJvbSBzdWNoIGNvbmN1cnJlbnQgYWNjZXNzZXMgYW5kCmFsbCBraW5k cyBvZiBleHBsb3Npb25zIGhhcHBlbi4gU2luY2Ugb25seSByb290IGNhbiB3cml0ZSB0byB0aG9z ZSBzeXNmcwp2YXJpYWJsZXMsIHRoZSBpc3N1ZSBpcyBub3QgYSBiaWcgZGVhbCBzZWN1cml0eS13 aXNlLgoKSG93ZXZlciwgY29uY3VycmVudCB3cml0ZXMgdG8gdGhlc2UgY29uZmlndXJhdGlvbiB2 YXJpYWJsZXMgaXMgdm9pZCBvZgpyZWFzb24gc28gdGhlIHByb3BlciB0aGluZyB0byBkbyBpcyB0 byBzZXJpYWxpemUgdGhlIGFjY2VzcyB3aXRoIGEgbXV0ZXguCgpCb3JpczoKCiAtIE1ha2Ugc3Rv cmVfaW50X3dpdGhfcmVzdGFydCgpIHVzZSBkZXZpY2Vfc3RvcmVfdWxvbmcoKSB0byBmaWx0ZXIg b3V0CiAgIG5lZ2F0aXZlIGludGVydmFscwogLSBMaW1pdCBtaW4gaW50ZXJ2YWwgdG8gMSBzZWNv bmQKIC0gQ29ycmVjdCBsb2NraW5nCiAtIE1hc3NhZ2UgY29tbWl0IG1lc3NhZ2UKClNpZ25lZC1v ZmYtYnk6IFNldW5naHVuIEhhbiA8a2thbWFndWlAZ21haWwuY29tPgpTaWduZWQtb2ZmLWJ5OiBC b3Jpc2xhdiBQZXRrb3YgPGJwQHN1c2UuZGU+ClNpZ25lZC1vZmYtYnk6IFRob21hcyBHbGVpeG5l ciA8dGdseEBsaW51dHJvbml4LmRlPgpDYzogR3JlZyBLcm9haC1IYXJ0bWFuIDxncmVna2hAbGlu dXhmb3VuZGF0aW9uLm9yZz4KQ2M6IFRvbnkgTHVjayA8dG9ueS5sdWNrQGludGVsLmNvbT4KQ2M6 IGxpbnV4LWVkYWMgPGxpbnV4LWVkYWNAdmdlci5rZXJuZWwub3JnPgpDYzogc3RhYmxlQHZnZXIu a2VybmVsLm9yZwpMaW5rOiBodHRwOi8vbGttbC5rZXJuZWwub3JnL3IvMjAxODAzMDIyMDI3MDYu OTQzNC0xLWtrYW1hZ3VpQGdtYWlsLmNvbQpTaWduZWQtb2ZmLWJ5OiBHcmVnIEtyb2FoLUhhcnRt YW4gPGdyZWdraEBsaW51eGZvdW5kYXRpb24ub3JnPgotLS0KIGFyY2gveDg2L2tlcm5lbC9jcHUv bWNoZWNrL21jZS5jIHwgICAyMiArKysrKysrKysrKysrKysrKysrKystCiAxIGZpbGUgY2hhbmdl ZCwgMjEgaW5zZXJ0aW9ucygrKSwgMSBkZWxldGlvbigtKQoKCgotLQpUbyB1bnN1YnNjcmliZSBm cm9tIHRoaXMgbGlzdDogc2VuZCB0aGUgbGluZSAidW5zdWJzY3JpYmUgbGludXgtZWRhYyIgaW4K dGhlIGJvZHkgb2YgYSBtZXNzYWdlIHRvIG1ham9yZG9tb0B2Z2VyLmtlcm5lbC5vcmcKTW9yZSBt YWpvcmRvbW8gaW5mbyBhdCAgaHR0cDovL3ZnZXIua2VybmVsLm9yZy9tYWpvcmRvbW8taW5mby5o dG1sCgotLS0gYS9hcmNoL3g4Ni9rZXJuZWwvY3B1L21jaGVjay9tY2UuYworKysgYi9hcmNoL3g4 Ni9rZXJuZWwvY3B1L21jaGVjay9tY2UuYwpAQCAtNTYsNiArNTYsOSBAQCBzdGF0aWMgREVGSU5F X01VVEVYKG1jZV9jaHJkZXZfcmVhZF9tdXRlCiAJCQkgICAgICByY3VfcmVhZF9sb2NrX3NjaGVk X2hlbGQoKSB8fCBcCiAJCQkgICAgICBsb2NrZGVwX2lzX2hlbGQoJm1jZV9jaHJkZXZfcmVhZF9t dXRleCkpCiAKKy8qIHN5c2ZzIHN5bmNocm9uaXphdGlvbiAqLworc3RhdGljIERFRklORV9NVVRF WChtY2Vfc3lzZnNfbXV0ZXgpOworCiAjZGVmaW5lIENSRUFURV9UUkFDRV9QT0lOVFMKICNpbmNs dWRlIDx0cmFjZS9ldmVudHMvbWNlLmg+CiAKQEAgLTIxODMsNiArMjE4Niw3IEBAIHN0YXRpYyBz c2l6ZV90IHNldF9pZ25vcmVfY2Uoc3RydWN0IGRldmkKIAlpZiAoa3N0cnRvdTY0KGJ1ZiwgMCwg Jm5ldykgPCAwKQogCQlyZXR1cm4gLUVJTlZBTDsKIAorCW11dGV4X2xvY2soJm1jZV9zeXNmc19t dXRleCk7CiAJaWYgKG1jYV9jZmcuaWdub3JlX2NlIF4gISFuZXcpIHsKIAkJaWYgKG5ldykgewog CQkJLyogZGlzYWJsZSBjZSBmZWF0dXJlcyAqLwpAQCAtMjE5NSw2ICsyMTk5LDggQEAgc3RhdGlj IHNzaXplX3Qgc2V0X2lnbm9yZV9jZShzdHJ1Y3QgZGV2aQogCQkJb25fZWFjaF9jcHUobWNlX2Vu YWJsZV9jZSwgKHZvaWQgKikxLCAxKTsKIAkJfQogCX0KKwltdXRleF91bmxvY2soJm1jZV9zeXNm c19tdXRleCk7CisKIAlyZXR1cm4gc2l6ZTsKIH0KIApAQCAtMjIwNyw2ICsyMjEzLDcgQEAgc3Rh dGljIHNzaXplX3Qgc2V0X2NtY2lfZGlzYWJsZWQoc3RydWN0CiAJaWYgKGtzdHJ0b3U2NChidWYs IDAsICZuZXcpIDwgMCkKIAkJcmV0dXJuIC1FSU5WQUw7CiAKKwltdXRleF9sb2NrKCZtY2Vfc3lz ZnNfbXV0ZXgpOwogCWlmIChtY2FfY2ZnLmNtY2lfZGlzYWJsZWQgXiAhIW5ldykgewogCQlpZiAo bmV3KSB7CiAJCQkvKiBkaXNhYmxlIGNtY2kgKi8KQEAgLTIyMTgsNiArMjIyNSw4IEBAIHN0YXRp YyBzc2l6ZV90IHNldF9jbWNpX2Rpc2FibGVkKHN0cnVjdAogCQkJb25fZWFjaF9jcHUobWNlX2Vu YWJsZV9jZSwgTlVMTCwgMSk7CiAJCX0KIAl9CisJbXV0ZXhfdW5sb2NrKCZtY2Vfc3lzZnNfbXV0 ZXgpOworCiAJcmV0dXJuIHNpemU7CiB9CiAKQEAgLTIyMjUsOCArMjIzNCwxOSBAQCBzdGF0aWMg c3NpemVfdCBzdG9yZV9pbnRfd2l0aF9yZXN0YXJ0KHN0CiAJCQkJICAgICAgc3RydWN0IGRldmlj ZV9hdHRyaWJ1dGUgKmF0dHIsCiAJCQkJICAgICAgY29uc3QgY2hhciAqYnVmLCBzaXplX3Qgc2l6 ZSkKIHsKLQlzc2l6ZV90IHJldCA9IGRldmljZV9zdG9yZV9pbnQocywgYXR0ciwgYnVmLCBzaXpl KTsKKwl1bnNpZ25lZCBsb25nIG9sZF9jaGVja19pbnRlcnZhbCA9IGNoZWNrX2ludGVydmFsOwor CXNzaXplX3QgcmV0ID0gZGV2aWNlX3N0b3JlX3Vsb25nKHMsIGF0dHIsIGJ1Ziwgc2l6ZSk7CisK KwlpZiAoY2hlY2tfaW50ZXJ2YWwgPT0gb2xkX2NoZWNrX2ludGVydmFsKQorCQlyZXR1cm4gcmV0 OworCisJaWYgKGNoZWNrX2ludGVydmFsIDwgMSkKKwkJY2hlY2tfaW50ZXJ2YWwgPSAxOworCisJ bXV0ZXhfbG9jaygmbWNlX3N5c2ZzX211dGV4KTsKIAltY2VfcmVzdGFydCgpOworCW11dGV4X3Vu bG9jaygmbWNlX3N5c2ZzX211dGV4KTsKKwogCXJldHVybiByZXQ7CiB9CiAK