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bh=qaMenLfvLw2Uad2z/52NeS/7HGvf+XS4cn22Ov6FPYo=; b=HIETclIQRdK5ecv2f7KZjGW7UMNfFdmXCTTW//dK0HO4dNTFVk/YjZWHf8MwXbmksy9hb3 YjkfJI/n4D7bG1i+M249qqhCqM/yHTRj/uUrZB39zINJad8auuoeffM6efrptLnjmDI/XP E5SZ2oHX+Ivv6bcitYM2Y1LGE5O1tco+3sATiJh4qIBgWyyWGwbu7vz3z5AhRBzAdJU7wI +w1F2efBL7j0H9BYhdXumJ3DUHc7pzjzcRzbN5jEqmgWc9dib7j6spckkm4UYX6xB5LksZ YuJaNTKNCuUTs6LroZRg1QWa4fNVOf07jk4FJyr3d+wKRjbdpim0URDZVokr2Q== From: Miquel Raynal To: "Michael Walle" Cc: "Tudor Ambarus" , "Pratyush Yadav" , "Richard Weinberger" , "Vignesh Raghavendra" , "Jonathan Corbet" , "Sean Anderson" , "Thomas Petazzoni" , "Steam Lin" , , , Subject: Re: [PATCH 06/19] mtd: spi-nor: swp: Explain the MEMLOCK ioctl implementation behaviour In-Reply-To: (Michael Walle's message of "Tue, 18 Nov 2025 10:53:42 +0100") References: <20251114-winbond-v6-18-rc1-spi-nor-swp-v1-0-487bc7129931@bootlin.com> <20251114-winbond-v6-18-rc1-spi-nor-swp-v1-6-487bc7129931@bootlin.com> User-Agent: mu4e 1.12.7; emacs 30.2 Date: Wed, 19 Nov 2025 10:18:23 +0100 Message-ID: <875xb6e5y8.fsf@bootlin.com> MIME-Version: 1.0 X-Last-TLS-Session-Version: TLSv1.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251119_011829_393842_306627DF X-CRM114-Status: GOOD ( 19.62 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org T24gMTgvMTEvMjAyNSBhdCAxMDo1Mzo0MiArMDEsICJNaWNoYWVsIFdhbGxlIiA8bXdhbGxlQGtl cm5lbC5vcmc+IHdyb3RlOgoKPiBPbiBGcmkgTm92IDE0LCAyMDI1IGF0IDY6NTMgUE0gQ0VULCBN aXF1ZWwgUmF5bmFsIHdyb3RlOgo+PiBBZGQgY29tbWVudHMgYWJvdXQgaG93IHRoZXNlIHJlcXVl c3RzIGFyZSBhY3R1YWxseSBoYW5kbGVkIGluIHRoZSBTUEkKPj4gTk9SIGNvcmUuIFRoZWlyIGJl aGF2aW91ciB3YXMgbm90IGVudGlyZWx5IGNsZWFyIHRvIG1lIGF0IGZpcnN0LCBhbmQKPj4gZXhw bGFpbmluZyB0aGVtIGluIHBsYWluIEVuZ2xpc2ggc291bmRzIHRoZSB3YXkgdG8gZ28uCj4+Cj4+ IFNpZ25lZC1vZmYtYnk6IE1pcXVlbCBSYXluYWwgPG1pcXVlbC5yYXluYWxAYm9vdGxpbi5jb20+ Cj4+IC0tLQo+PiAgZHJpdmVycy9tdGQvc3BpLW5vci9zd3AuYyB8IDggKysrKysrKysKPj4gIDEg ZmlsZSBjaGFuZ2VkLCA4IGluc2VydGlvbnMoKykKPj4KPj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMv bXRkL3NwaS1ub3Ivc3dwLmMgYi9kcml2ZXJzL210ZC9zcGktbm9yL3N3cC5jCj4+IGluZGV4IDli YzVhMzU2NDQ0NjY1YWQ4ODI0ZTllMTJkNjc5ZmQ1NTFiM2U2N2QuLmVkZTAzZjI2ZGUzYzY1ZmY1 M2MxY2I4ODhjMmM0M2FlYTI2OGI4NWEgMTAwNjQ0Cj4+IC0tLSBhL2RyaXZlcnMvbXRkL3NwaS1u b3Ivc3dwLmMKPj4gKysrIGIvZHJpdmVycy9tdGQvc3BpLW5vci9zd3AuYwo+PiBAQCAtMzQxLDYg KzM0MSwxNCBAQCBzdGF0aWMgaW50IHNwaV9ub3Jfc3JfaXNfbG9ja2VkKHN0cnVjdCBzcGlfbm9y ICpub3IsIGxvZmZfdCBvZnMsIHU2NCBsZW4pCj4+ICAJcmV0dXJuIHNwaV9ub3JfaXNfbG9ja2Vk X3NyKG5vciwgb2ZzLCBsZW4sIG5vci0+Ym91bmNlYnVmWzBdKTsKPj4gIH0KPj4gIAo+PiArLyoK Pj4gKyAqIFRoZXNlIGlvY3RscyBiZWhhdmUgYWNjb3JkaW5nIHRvIHRoZSBmb2xsb3dpbmcgcnVs ZXM6Cj4+ICsgKiAtPmxvY2soKTogTmV2ZXIgbG9ja3MgbW9yZSB0aGFuIHdoYXQgaXMgcmVxdWVz dGVkLCBpZS4gbWF5IGxvY2sgbGVzcwo+Cj4gVGhhdCBiZWhhdmlvciBzb3VuZHMgc28gd3Jvbmcu Li4gVGhlIHVzZXIgcmVxdWVzdHMgYSByZWdpb24gdG8gYmUKPiBsb2NrZWQsIGFuZCBpdCBpc24n dCBhY3R1YWxseSBsb2NrZWQuCgpBZ3JlZWQuIEkgcmVhbGx5IGdvdCBwdXp6bGVkIGJ5IHRoYXQu Cgo+PiArICogLT51bmxvY2soKTogTmV2ZXIgdW5sb2NrcyBtb3JlIHRoYW4gd2hhdCBpcyByZXF1 ZXN0ZWQsIGllLiBtYXkgdW5sb2NrIGxlc3MKPgo+IFRoYXQgc2VlbXMgc29tZXdoYXQgc2FuZS4K Pgo+IE1heWJlIHdlIHNob3VsZCByZXR1cm4gLUVJTlZBTCBpZiBvZnMgb3Igb2ZzK2xlbiBhcmVu J3QgYXQgc2VjdG9yCj4gYm91bmRhcmllcy4gWWVhaCBpdCdzIGEgY2hhbmdlIGluIHRoZSBVQVBJ LCBidXQgSSdtIG5vdCBzdXJlIHRoZQo+IGN1cnJlbnQgYmVoYXZpb3IgaXMgbm90IGhhcm1mdWwg YW5kIG1pc2xlYWRpbmcuCgpJIHdvdWxkIGV2ZW4gZ28gZnVydGhlciBhbmQgcHJvcG9zZSB0byBy ZXR1cm4gLUVJTlZBTCB3aGVuZXZlciB0aGUKcmVxdWVzdCBpcyBub3QgZXhhY3RseSBkb2FibGUu IEJlaW5nIGF0IGEgYmxvY2sgYm91bmRhcnkgaXMgbm90IGVub3VnaCwKYXMgdGhlcmUgYXJlIG1h bnkgYm91bmRhcmllcyB3ZSBjYW5ub3QgZGVzY3JpYmUgd2l0aCBqdXN0IDQgcHJvdGVjdGlvbgpi aXRzLgoKQnV0IHRoaXMgaXMgc29tZXdoYXQgYSB1QVBJIGNoYW5nZSBpbmRlZWQuIFNvIGluIHRo ZSBmaXJzdCBwbGFjZSwgSSB3aWxsCmtlZXAgdGhpcyBjb21tZW50LiBCdXQgaWYgd2UgZmVlbCBs aWtlIHdlIHNob3VsZCBtYWtlIHRoZSB1QVBJIHN0cmljdGVyLAppdCBjYW4gY29tZSBvbiB0b3Au IERvaW5nIHRoaXMgd291bGQgcmVxdWlyZSBhIGJyb2FkIGFja25vd2xlZGdlbWVudC4KCj4+ICsg KiAtaXNfbG9ja2VkKCk6IENoZWNrcyBpZiB0aGUgcmVnaW9uIGlzICpmdWxseSogbG9ja2VkLCBy ZXR1cm5zIGZhbHNlIG90aGVyd2lzZS4KPj4gKyAqICAgICAgICAgICAgICAgVGhpcyBmZWViYWNr IG1heSBiZSBtaXNsZWFkaW5nIGJlY2F1c2UgdXNlcnMgbWF5IGdldCBhbiAidW5sb2NrZWQiCj4+ ICsgKiAgICAgICAgICAgICAgIHN0YXR1cyBldmVuIHRob3VnaCBhIHN1YnBhcnQgb2YgdGhlIHJl Z2lvbiBpcyBlZmZlY3RpdmVseSBsb2NrZWQuCj4+ICsgKi8KPj4gIHN0YXRpYyBjb25zdCBzdHJ1 Y3Qgc3BpX25vcl9sb2NraW5nX29wcyBzcGlfbm9yX3NyX2xvY2tpbmdfb3BzID0gewo+PiAgCS5s b2NrID0gc3BpX25vcl9zcl9sb2NrLAo+PiAgCS51bmxvY2sgPSBzcGlfbm9yX3NyX3VubG9jaywK Pgo+IEFueXdheSwgYXMgaXQgaXMgaG93IGl0J3MgY3VycmVudGx5IGJlaGF2aW5nOgo+Cj4gUmV2 aWV3ZWQtYnk6IE1pY2hhZWwgV2FsbGUgPG13YWxsZUBrZXJuZWwub3JnPgoKVGhhbmtzIQpNaXF1 w6hsCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X18KTGludXggTVREIGRpc2N1c3Npb24gbWFpbGluZyBsaXN0Cmh0dHA6Ly9saXN0cy5pbmZyYWRl YWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtbXRkLwo=