From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Lutomirski Date: Sun, 20 Sep 2020 00:14:41 +0000 Subject: Re: [PATCH 1/9] kernel: add a PF_FORCE_COMPAT flag Message-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="windows-1250" Content-Transfer-Encoding: base64 List-Id: References: <20200919224122.GJ3421308@ZenIV.linux.org.uk> <36CF3DE7-7B4B-41FD-9818-FDF8A5B440FB@amacapital.net> <20200919232411.GK3421308@ZenIV.linux.org.uk> In-Reply-To: <20200919232411.GK3421308@ZenIV.linux.org.uk> To: Al Viro Cc: Christoph Hellwig , Andrew Morton , Jens Axboe , Arnd Bergmann , David Howells , linux-arm-kernel , X86 ML , LKML , "open list:MIPS" , Parisc List , linuxppc-dev , linux-s390 , sparclinux , linux-block , Linux SCSI List , Linux FS Devel , linux-aio@kvack.org, io-uring@vger.kernel.org, linux-arch , Linux-MM , Network Development , keyrings@vger.kernel.org, LSM List T24gU2F0LCBTZXAgMTksIDIwMjAgYXQgNDoyNCBQTSBBbCBWaXJvIDx2aXJvQHplbml2LmxpbnV4 Lm9yZy51az4gd3JvdGU6Cj4KPiBPbiBTYXQsIFNlcCAxOSwgMjAyMCBhdCAwMzo1Mzo0MFBNIC0w NzAwLCBBbmR5IEx1dG9taXJza2kgd3JvdGU6Cj4KPiA+ID4gSXQgd291bGQgbm90IGJlIGEgd2lu IC0gbW9zdCBvZiB0aGUgc3lzY2FsbHMgZG9uJ3QgZ2l2ZSBhIGRhbW4KPiA+ID4gYWJvdXQgMzJi aXQgdnMuIDY0Yml0Li4uCj4gPgo+ID4gQW55IHJlYXNvbmFibGUgaW1wbGVtZW50YXRpb24gd291 bGQgb3B0aW1pemUgaXQgb3V0IGZvciBzeXNjYWxscyB0aGF0IGRvbuKAmXQgY2FyZS4gIE9yIGl0 IGNvdWxkIGJlIGV4cGxpY2l0Ogo+ID4KPiA+IERFRklORV9NVUxUSUFSQ0hfU1lTQ0FMTCguLi4p Cj4KPiAxKSB3aGF0IHdvdWxkIHRoYXQgbG9vayBsaWtlPwoKSW4gZWZmZWN0LCBpdCB3b3VsZCB3 b3JrIGxpa2UgdGhpczoKCi8qIEFyY2gtc3BlY2lmaWMsIGJ1dCB0aGVyZSdzIGEgZ2VuZXJpYyBj YXNlIGZvciBzYW5lIGFyY2hpdGVjdHVyZXMuICovCmVudW0gc3lzY2FsbF9hcmNoIHsKICBTWVND QUxMX05BVElWRSwKICBTWVNDQUxMX0NPTVBBVCwKICBTWVNDQUxMX1gzMiwKfTsKCkRFRklORV9N VUxUSUFSQ0hfU1lTQ0FMTG4oYXJncywgYXJjaCkKewogIGFyZ3MgYXJlIHRoZSBhcmdzIGhlcmUs IGFuZCBhcmNoIGlzIHRoZSBhcmNoLgp9Cgo+IDIpIGhhdmUgeW91IGNvdW50ZWQgdGhlIHN5c2Nh bGxzIHRoYXQgZG8gYW5kIGRvIG5vdCBuZWVkIHRoYXQ/CgpOby4KCj4gMykgaG93IG1hbnkgb2Yg dGhvc2UgcmVhbGlzdGljYWxseSAqY2FuKiBiZSB1bmlmaWVkIHdpdGggdGhlaXIKPiBjb21wYXQg Y291bnRlcnBhcnRzPyAgW2hpbnQ6IGlvY3RsKDIpIGNhbm5vdF0KClRoZXJlIHdvdWxkIGJlIG5v IHJlcXVpcmVtZW50IHRvIHVuaWZ5IGFueXRoaW5nLiAgVGhlIGlkZWEgaXMgdGhhdAp3ZSdkIGdl dCByaWQgb2YgYWxsIHRoZSBnbG9iYWwgc3RhdGUgZmxhZ3MuCgpGb3IgaW9jdGwsIHdlJ2QgaGF2 ZSBhIG5ldyBmaWxlX29wZXJhdGlvbjoKCmxvbmcgaW9jdGwoc3RydWN0IGZpbGUgKiwgdW5zaWdu ZWQgaW50LCB1bnNpZ25lZCBsb25nLCBlbnVtIHN5c2NhbGxfYXJjaCk7CgpJJ20gbm90IHNheWlu ZyB0aGlzIGlzIGVhc3ksIGJ1dCBJIHRoaW5rIGl0J3MgcG9zc2libGUgYW5kIHRoZSByZXN1bHQK d291bGQgYmUgbW9yZSBvYnZpb3VzbHkgY29ycmVjdCB0aGFuIHdoYXQgd2UgaGF2ZSBub3cu