From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <3c34d8e2-6f84-933f-a4ed-338cd300d6b0@linux.ibm.com> Date: Fri, 6 May 2022 00:25:08 +0530 Subject: Re: [PATCH 08/30] powerpc/setup: Refactor/untangle panic notifiers Content-Language: en-US References: <20220427224924.592546-1-gpiccoli@igalia.com> <20220427224924.592546-9-gpiccoli@igalia.com> From: Hari Bathini In-Reply-To: <20220427224924.592546-9-gpiccoli@igalia.com> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-um" Errors-To: linux-um-bounces+geert=linux-m68k.org@lists.infradead.org To: "Guilherme G. Piccoli" , akpm@linux-foundation.org, bhe@redhat.com, pmladek@suse.com, kexec@lists.infradead.org Cc: linux-kernel@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com, coresight@lists.linaro.org, linuxppc-dev@lists.ozlabs.org, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-edac@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-leds@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linux-pm@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-tegra@vger.kernel.org, linux-um@lists.infradead.org, linux-xtensa@linux-xtensa.org, netdev@vger.kernel.org, openipmi-developer@lists.sourceforge.net, rcu@vger.kernel.org, sparclinux@vger.kernel.org, xen-devel@lists.xenproject.org, x86@kernel.org, kernel-dev@igalia.com, kernel@gpiccoli.net, halves@canonical.com, fabiomirmar@gmail.com, alejandro.j.jimenez@oracle.com, andriy.shevchenko@linux.intel.com, arnd@arndb.de, bp@alien8.de, corbet@lwn.net, d.hatayama@jp.fujitsu.com, dave.hansen@linux.intel.com, dyoung@redhat.com, feng.tang@intel.com, gregkh@linuxfoundation.org, mikelley@microsoft.com, hidehiro.kawai.ez@hitachi.com, jgross@suse.com, john.ogness@linutronix.de, keescook@chromium.org, luto@kernel.org, mhiramat@kernel.org, mingo@redhat.com, paulmck@kernel.org, peterz@infradead.org, rostedt@goodmis.org, senozhatsky@chromium.org, stern@rowland.harvard.edu, tglx@linutronix.de, vgoyal@redhat.com, vkuznets@redhat.com, will@kernel.org, Benjamin Herrenschmidt , Michael Ellerman , Nicholas Piggin , Paul Mackerras CgpPbiAyOC8wNC8yMiA0OjE5IGFtLCBHdWlsaGVybWUgRy4gUGljY29saSB3cm90ZToKPiBUaGUg cGFuaWMgbm90aWZpZXJzIGluZnJhc3RydWN0dXJlIGlzIGEgYml0IGxpbWl0ZWQgaW4gdGhlIHNj b3BlIG9mCj4gdGhlIGNhbGxiYWNrcyAtIGJhc2ljYWxseSBldmVyeSBraW5kIG9mIGZ1bmN0aW9u YWxpdHkgaXMgZHJvcHBlZAo+IGluIGEgbGlzdCB0aGF0IHJ1bnMgaW4gdGhlIHNhbWUgcG9pbnQg ZHVyaW5nIHRoZSBrZXJuZWwgcGFuaWMgcGF0aC4KPiBUaGlzIGlzIG5vdCByZWFsbHkgb24gcGFy IHdpdGggdGhlIGNvbXBsZXhpdGllcyBhbmQgcGFydGljdWxhcml0aWVzCj4gb2YgYXJjaGl0ZWN0 dXJlIC8gaHlwZXJ2aXNvcnMnIG5lZWRzLCBhbmQgYSByZWZhY3RvciBpcyBvbmdvaW5nLgo+IAo+ IEFzIHBhcnQgb2YgdGhpcyByZWZhY3RvciwgaXQgd2FzIG9ic2VydmVkIHRoYXQgcG93ZXJwYyBo YXMgMiBub3RpZmllcnMsCj4gd2l0aCBtaXhlZCBnb2Fsczogb25lIGlzIGp1c3QgYSBLQVNMUiBv ZmZzZXQgZHVtcGVyLCB3aGVyZWFzIHRoZSBvdGhlcgo+IGFpbXMgdG8gaGFyZC1kaXNhYmxlIElS UXMgKG5lY2Vzc2FyeSBvbiBwYW5pYyBwYXRoKSwgd2FybiBmaXJtd2FyZSBvZgo+IHRoZSBwYW5p YyBldmVudCAoZmFkdW1wKSBhbmQgcnVuIGxvdy1sZXZlbCBwbGF0Zm9ybS1zcGVjaWZpYyBtYWNo aW5lcnkKPiB0aGF0IG1pZ2h0IHN0b3Aga2VybmVsIGV4ZWN1dGlvbiBhbmQgbmV2ZXIgY29tZSBi YWNrLgo+IAo+IENsZWFybHksIHRoZSAybmQgbm90aWZpZXIgaGFzIG9wcG9zZWQgZ29hbHM6IGRp c2FibGUgSVJRcyAvIGZhZHVtcAo+IHNob3VsZCBydW4gZWFybGllciB3aGlsZSBsb3ctbGV2ZWwg cGxhdGZvcm0gYWN0aW9ucyBzaG91bGQKPiBydW4gbGF0ZSBzaW5jZSBpdCBtaWdodCBub3QgZXZl biByZXR1cm4uIEhlbmNlLCB0aGlzIHBhdGNoIGRlY291cGxlcwo+IHRoZSBub3RpZmllcnMgc3Bs aXR0aW5nIHRoZW0gaW4gdGhyZWU6Cj4gCj4gLSBGaXJzdCBvbmUgaXMgcmVzcG9uc2libGUgZm9y IGhhcmQtZGlzYWJsZSBJUlFzIGFuZCBmYWR1bXAsCj4gc2hvdWxkIHJ1biBlYXJseTsKPiAKPiAt IFRoZSBrZXJuZWwgS0FTTFIgb2Zmc2V0IGR1bXBlciBpcyByZWFsbHkgYW4gaW5mb3JtYXRpdmUg bm90aWZpZXIsCj4gaGFybWxlc3MgYW5kIG1heSBydW4gYXQgYW55IG1vbWVudCBpbiB0aGUgcGFu aWMgcGF0aDsKPiAKPiAtIFRoZSBsYXN0IG5vdGlmaWVyIHNob3VsZCBydW4gbGFzdCwgc2luY2Ug aXQgYWltcyB0byBwZXJmb3JtCj4gbG93LWxldmVsIGFjdGlvbnMgZm9yIHNwZWNpZmljIHBsYXRm b3JtcywgYW5kIG1pZ2h0IG5ldmVyIHJldHVybi4KPiBJdCBpcyBhbHNvIG9ubHkgcmVnaXN0ZXJl ZCBmb3IgMiBwbGF0Zm9ybXMsIHBzZXJpZXMgYW5kIHBzMy4KPiAKPiBUaGUgcGF0Y2ggYmV0dGVy IGRvY3VtZW50cyB0aGUgbm90aWZpZXJzIGFuZCBjbGVhcnMgdGhlIGNvZGUgdG9vLAo+IGFsc28g cmVtb3ZpbmcgYSB1c2VsZXNzIGhlYWRlci4KPiAKPiBDdXJyZW50bHkgbm8gZnVuY3Rpb25hbGl0 eSBjaGFuZ2Ugc2hvdWxkIGJlIG9ic2VydmVkLCBidXQgYWZ0ZXIKPiB0aGUgcGxhbm5lZCBwYW5p YyByZWZhY3RvciB3ZSBzaG91bGQgZXhwZWN0IG1vcmUgcGFuaWMgcmVsaWFiaWxpdHkKPiB3aXRo IHRoaXMgcGF0Y2guCj4gCj4gQ2M6IEJlbmphbWluIEhlcnJlbnNjaG1pZHQgPGJlbmhAa2VybmVs LmNyYXNoaW5nLm9yZz4KPiBDYzogSGFyaSBCYXRoaW5pIDxoYmF0aGluaUBsaW51eC5pYm0uY29t Pgo+IENjOiBNaWNoYWVsIEVsbGVybWFuIDxtcGVAZWxsZXJtYW4uaWQuYXU+Cj4gQ2M6IE5pY2hv bGFzIFBpZ2dpbiA8bnBpZ2dpbkBnbWFpbC5jb20+Cj4gQ2M6IFBhdWwgTWFja2VycmFzIDxwYXVs dXNAc2FtYmEub3JnPgo+IFNpZ25lZC1vZmYtYnk6IEd1aWxoZXJtZSBHLiBQaWNjb2xpIDxncGlj Y29saUBpZ2FsaWEuY29tPgoKVGhlIGNoYW5nZSBsb29rcyBnb29kLiBJIGhhdmUgdGVzdGVkIGl0 IG9uIGFuIExQQVIgKHBwYzY0KS4KClJldmlld2VkLWJ5OiBIYXJpIEJhdGhpbmkgPGhiYXRoaW5p QGxpbnV4LmlibS5jb20+Cgo+IC0tLQo+IAo+IFdlJ2QgbGlrZSB0byB0aGFua3Mgc3BlY2lhbGx5 IHRoZSBNaW5pQ2xvdWQgaW5mcmFzdHJ1Y3R1cmUgWzBdIG1haW50YWluZXJzLAo+IHRoYXQgYWxs b3cgdXMgdG8gdGVzdCBQb3dlclBDIGNvZGUgaW4gYSB2ZXJ5IGNvbXBsZXRlLCBmdW5jdGlvbmFs IGFuZCBGUkVFCj4gZW52aXJvbm1lbnQgKHRoZXJlJ3Mgbm8gbmVlZCBldmVuIGZvciBhZGRpbmcg YSBjcmVkaXQgY2FyZCwgbGlrZSBtYW55ICJmcmVlIgo+IGNsb3VkcyByZXF1aXJlIMKswqwgKS4K PiAKPiBbMF0gaHR0cHM6Ly9vcGVucG93ZXIuaWMudW5pY2FtcC5ici9taW5pY2xvdWQKPiAKPiAg IGFyY2gvcG93ZXJwYy9rZXJuZWwvc2V0dXAtY29tbW9uLmMgfCA3NCArKysrKysrKysrKysrKysr KysrKysrLS0tLS0tLS0KPiAgIDEgZmlsZSBjaGFuZ2VkLCA1NCBpbnNlcnRpb25zKCspLCAyMCBk ZWxldGlvbnMoLSkKPiAKPiBkaWZmIC0tZ2l0IGEvYXJjaC9wb3dlcnBjL2tlcm5lbC9zZXR1cC1j b21tb24uYyBiL2FyY2gvcG93ZXJwYy9rZXJuZWwvc2V0dXAtY29tbW9uLmMKPiBpbmRleCA1MThh ZTVhYTk0MTAuLjUyZjk2YjIwOWE5NiAxMDA2NDQKPiAtLS0gYS9hcmNoL3Bvd2VycGMva2VybmVs L3NldHVwLWNvbW1vbi5jCj4gKysrIGIvYXJjaC9wb3dlcnBjL2tlcm5lbC9zZXR1cC1jb21tb24u Ywo+IEBAIC0yMyw3ICsyMyw2IEBACj4gICAjaW5jbHVkZSA8bGludXgvY29uc29sZS5oPgo+ICAg I2luY2x1ZGUgPGxpbnV4L3NjcmVlbl9pbmZvLmg+Cj4gICAjaW5jbHVkZSA8bGludXgvcm9vdF9k ZXYuaD4KPiAtI2luY2x1ZGUgPGxpbnV4L25vdGlmaWVyLmg+Cj4gICAjaW5jbHVkZSA8bGludXgv Y3B1Lmg+Cj4gICAjaW5jbHVkZSA8bGludXgvdW5pc3RkLmg+Cj4gICAjaW5jbHVkZSA8bGludXgv c2VyaWFsLmg+Cj4gQEAgLTY4MCw4ICs2NzksMjUgQEAgaW50IGNoZWNrX2xlZ2FjeV9pb3BvcnQo dW5zaWduZWQgbG9uZyBiYXNlX3BvcnQpCj4gICB9Cj4gICBFWFBPUlRfU1lNQk9MKGNoZWNrX2xl Z2FjeV9pb3BvcnQpOwo+ICAgCj4gLXN0YXRpYyBpbnQgcHBjX3BhbmljX2V2ZW50KHN0cnVjdCBu b3RpZmllcl9ibG9jayAqdGhpcywKPiAtICAgICAgICAgICAgICAgICAgICAgICAgICAgICB1bnNp Z25lZCBsb25nIGV2ZW50LCB2b2lkICpwdHIpCj4gKy8qCj4gKyAqIFBhbmljIG5vdGlmaWVycyBz ZXR1cAo+ICsgKgo+ICsgKiBXZSBoYXZlIDMgbm90aWZpZXJzIGZvciBwb3dlcnBjLCBlYWNoIG9u ZSBmcm9tIGEgZGlmZmVyZW50ICJuYXR1cmUiOgo+ICsgKgo+ICsgKiAtIHBwY19wYW5pY19mYWR1 bXBfaGFuZGxlcigpIGlzIGEgaHlwZXJ2aXNvciBub3RpZmllciwgd2hpY2ggaGFyZC1kaXNhYmxl cwo+ICsgKiAgIElSUXMgYW5kIGRlYWwgd2l0aCB0aGUgRmlybXdhcmUtQXNzaXN0ZWQgZHVtcCwg d2hlbiBpdCBpcyBjb25maWd1cmVkOwo+ICsgKiAgIHNob3VsZCBydW4gZWFybHkgaW4gdGhlIHBh bmljIHBhdGguCj4gKyAqCj4gKyAqIC0gZHVtcF9rZXJuZWxfb2Zmc2V0KCkgaXMgYW4gaW5mb3Jt YXRpdmUgbm90aWZpZXIsIGp1c3Qgc2hvd2luZyB0aGUgS0FTTFIKPiArICogICBvZmZzZXQgaWYg d2UgaGF2ZSBSQU5ET01JWkVfQkFTRSBzZXQuCj4gKyAqCj4gKyAqIC0gcHBjX3BhbmljX3BsYXRm b3JtX2hhbmRsZXIoKSBpcyBhIGxvdy1sZXZlbCBoYW5kbGVyIHRoYXQncyByZWdpc3RlcmVkCj4g KyAqICAgb25seSBpZiB0aGUgcGxhdGZvcm0gd2lzaGVzIHRvIHBlcmZvcm0gZmluYWwgYWN0aW9u cyBpbiB0aGUgcGFuaWMgcGF0aCwKPiArICogICBoZW5jZSBpdCBzaG91bGQgcnVuIGxhdGUgYW5k IG1pZ2h0IG5vdCBldmVuIHJldHVybi4gQ3VycmVudGx5LCBvbmx5Cj4gKyAqICAgcHNlcmllcyBh bmQgcHMzIHBsYXRmb3JtcyByZWdpc3RlciBjYWxsYmFja3MuCj4gKyAqLwo+ICtzdGF0aWMgaW50 IHBwY19wYW5pY19mYWR1bXBfaGFuZGxlcihzdHJ1Y3Qgbm90aWZpZXJfYmxvY2sgKnRoaXMsCj4g KwkJCQkgICAgdW5zaWduZWQgbG9uZyBldmVudCwgdm9pZCAqcHRyKQo+ICAgewo+ICAgCS8qCj4g ICAJICogcGFuaWMgZG9lcyBhIGxvY2FsX2lycV9kaXNhYmxlLCBidXQgd2UgcmVhbGx5Cj4gQEAg LTY5MSw0NSArNzA3LDYzIEBAIHN0YXRpYyBpbnQgcHBjX3BhbmljX2V2ZW50KHN0cnVjdCBub3Rp Zmllcl9ibG9jayAqdGhpcywKPiAgIAo+ICAgCS8qCj4gICAJICogSWYgZmlybXdhcmUtYXNzaXN0 ZWQgZHVtcCBoYXMgYmVlbiByZWdpc3RlcmVkIHRoZW4gdHJpZ2dlcgo+IC0JICogZmlybXdhcmUt YXNzaXN0ZWQgZHVtcCBhbmQgbGV0IGZpcm13YXJlIGhhbmRsZSBldmVyeXRoaW5nIGVsc2UuCj4g KwkgKiBpdHMgY2FsbGJhY2sgYW5kIGxldCB0aGUgZmlybXdhcmUgaGFuZGxlcyBldmVyeXRoaW5n IGVsc2UuCj4gICAJICovCj4gICAJY3Jhc2hfZmFkdW1wKE5VTEwsIHB0cik7Cj4gLQlpZiAocHBj X21kLnBhbmljKQo+IC0JCXBwY19tZC5wYW5pYyhwdHIpOyAgLyogTWF5IG5vdCByZXR1cm4gKi8K PiArCj4gICAJcmV0dXJuIE5PVElGWV9ET05FOwo+ICAgfQo+ICAgCj4gLXN0YXRpYyBzdHJ1Y3Qg bm90aWZpZXJfYmxvY2sgcHBjX3BhbmljX2Jsb2NrID0gewo+IC0JLm5vdGlmaWVyX2NhbGwgPSBw cGNfcGFuaWNfZXZlbnQsCj4gLQkucHJpb3JpdHkgPSBJTlRfTUlOIC8qIG1heSBub3QgcmV0dXJu OyBtdXN0IGJlIGRvbmUgbGFzdCAqLwo+IC19Owo+IC0KPiAtLyoKPiAtICogRHVtcCBvdXQga2Vy bmVsIG9mZnNldCBpbmZvcm1hdGlvbiBvbiBwYW5pYy4KPiAtICovCj4gICBzdGF0aWMgaW50IGR1 bXBfa2VybmVsX29mZnNldChzdHJ1Y3Qgbm90aWZpZXJfYmxvY2sgKnNlbGYsIHVuc2lnbmVkIGxv bmcgdiwKPiAgIAkJCSAgICAgIHZvaWQgKnApCj4gICB7Cj4gICAJcHJfZW1lcmcoIktlcm5lbCBP ZmZzZXQ6IDB4JWx4IGZyb20gMHglbHhcbiIsCj4gICAJCSBrYXNscl9vZmZzZXQoKSwgS0VSTkVM QkFTRSk7Cj4gICAKPiAtCXJldHVybiAwOwo+ICsJcmV0dXJuIE5PVElGWV9ET05FOwo+ICAgfQo+ ICAgCj4gK3N0YXRpYyBpbnQgcHBjX3BhbmljX3BsYXRmb3JtX2hhbmRsZXIoc3RydWN0IG5vdGlm aWVyX2Jsb2NrICp0aGlzLAo+ICsJCQkJICAgICAgdW5zaWduZWQgbG9uZyBldmVudCwgdm9pZCAq cHRyKQo+ICt7Cj4gKwkvKgo+ICsJICogVGhpcyBoYW5kbGVyIGlzIG9ubHkgcmVnaXN0ZXJlZCBp ZiB3ZSBoYXZlIGEgcGFuaWMgY2FsbGJhY2sKPiArCSAqIG9uIHBwY19tZCwgaGVuY2UgTlVMTCBj aGVjayBpcyBub3QgbmVlZGVkLgo+ICsJICogQWxzbywgaXQgbWF5IG5vdCByZXR1cm4sIHNvIGl0 IHJ1bnMgcmVhbGx5IGxhdGUgb24gcGFuaWMgcGF0aC4KPiArCSAqLwo+ICsJcHBjX21kLnBhbmlj KHB0cik7Cj4gKwo+ICsJcmV0dXJuIE5PVElGWV9ET05FOwo+ICt9Cj4gKwo+ICtzdGF0aWMgc3Ry dWN0IG5vdGlmaWVyX2Jsb2NrIHBwY19mYWR1bXBfYmxvY2sgPSB7Cj4gKwkubm90aWZpZXJfY2Fs bCA9IHBwY19wYW5pY19mYWR1bXBfaGFuZGxlciwKPiArCS5wcmlvcml0eSA9IElOVF9NQVgsIC8q IHJ1biBlYXJseSwgdG8gbm90aWZ5IHRoZSBmaXJtd2FyZSBBU0FQICovCj4gK307Cj4gKwo+ICAg c3RhdGljIHN0cnVjdCBub3RpZmllcl9ibG9jayBrZXJuZWxfb2Zmc2V0X25vdGlmaWVyID0gewo+ IC0JLm5vdGlmaWVyX2NhbGwgPSBkdW1wX2tlcm5lbF9vZmZzZXQKPiArCS5ub3RpZmllcl9jYWxs ID0gZHVtcF9rZXJuZWxfb2Zmc2V0LAo+ICt9Owo+ICsKPiArc3RhdGljIHN0cnVjdCBub3RpZmll cl9ibG9jayBwcGNfcGFuaWNfYmxvY2sgPSB7Cj4gKwkubm90aWZpZXJfY2FsbCA9IHBwY19wYW5p Y19wbGF0Zm9ybV9oYW5kbGVyLAo+ICsJLnByaW9yaXR5ID0gSU5UX01JTiwgLyogbWF5IG5vdCBy ZXR1cm47IG11c3QgYmUgZG9uZSBsYXN0ICovCj4gICB9Owo+ICAgCj4gICB2b2lkIF9faW5pdCBz ZXR1cF9wYW5pYyh2b2lkKQo+ICAgewo+ICsJLyogSGFyZC1kaXNhYmxlcyBJUlFzICsgZGVhbCB3 aXRoIEZXLWFzc2lzdGVkIGR1bXAgKGZhZHVtcCkgKi8KPiArCWF0b21pY19ub3RpZmllcl9jaGFp bl9yZWdpc3RlcigmcGFuaWNfbm90aWZpZXJfbGlzdCwKPiArCQkJCSAgICAgICAmcHBjX2ZhZHVt cF9ibG9jayk7Cj4gKwo+ICAgCWlmIChJU19FTkFCTEVEKENPTkZJR19SQU5ET01JWkVfQkFTRSkg JiYga2FzbHJfb2Zmc2V0KCkgPiAwKQo+ICAgCQlhdG9taWNfbm90aWZpZXJfY2hhaW5fcmVnaXN0 ZXIoJnBhbmljX25vdGlmaWVyX2xpc3QsCj4gICAJCQkJCSAgICAgICAma2VybmVsX29mZnNldF9u b3RpZmllcik7Cj4gICAKPiAtCS8qIFBQQzY0IGFsd2F5cyBkb2VzIGEgaGFyZCBpcnEgZGlzYWJs ZSBpbiBpdHMgcGFuaWMgaGFuZGxlciAqLwo+IC0JaWYgKCFJU19FTkFCTEVEKENPTkZJR19QUEM2 NCkgJiYgIXBwY19tZC5wYW5pYykKPiAtCQlyZXR1cm47Cj4gLQlhdG9taWNfbm90aWZpZXJfY2hh aW5fcmVnaXN0ZXIoJnBhbmljX25vdGlmaWVyX2xpc3QsICZwcGNfcGFuaWNfYmxvY2spOwo+ICsJ LyogTG93LWxldmVsIHBsYXRmb3JtLXNwZWNpZmljIHJvdXRpbmVzIHRoYXQgc2hvdWxkIHJ1biBv biBwYW5pYyAqLwo+ICsJaWYgKHBwY19tZC5wYW5pYykKPiArCQlhdG9taWNfbm90aWZpZXJfY2hh aW5fcmVnaXN0ZXIoJnBhbmljX25vdGlmaWVyX2xpc3QsCj4gKwkJCQkJICAgICAgICZwcGNfcGFu aWNfYmxvY2spOwo+ICAgfQo+ICAgCj4gICAjaWZkZWYgQ09ORklHX0NIRUNLX0NBQ0hFX0NPSEVS RU5DWQoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGlu dXgtdW0gbWFpbGluZyBsaXN0CmxpbnV4LXVtQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xp c3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC11bQo=