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bh=W3Swg/3Aww/HrVatIhFO5ktuwEuVhc0PGPbbJ75c/r8=; b=Ixpd1Skk8Ws8EbxOBNWcmd4NigI856JcjOJ9d691wpAYFNeZyAoS3LfYWMITdvzdMbfdJj jlH7b1ZkANQEmfPxaXJ0gr9LBMjQG49Pe8hgVV4pUjiw0V9SEMfJiNu3F8Ld7Do6J1Z+UR nVo3OGLmYeIMCQQ83ndB2O5eobO8CPpXt4r0FbmpIyDZgwQzfhKUJy1aWW+HDmwb0UoPku QHEvA0EpczDfJy0FrunzxPbn+am1qP0cxy7T+hT/B8jr33dBHXAvencOXF9VYT12Hrzh86 rZeuKtr6qufjv0cqd3yeHDJ+kWA97swvDzKMRUb4hGljHOPUopU1nsV305xo8Q== From: Miquel Raynal To: fzz <1768315307@qq.com> Cc: Vignesh Raghavendra , Richard Weinberger , linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mtd: spinand: cache the last read page to avoid redundant SPI operations In-Reply-To: (fzz's message of "Mon, 7 Sep 2026 19:10:40 +0800") References: User-Agent: mu4e 1.12.12; emacs 30.2 Date: Mon, 07 Sep 2026 14:33:24 +0200 Message-ID: <87jyoxw8a3.fsf@bootlin.com> MIME-Version: 1.0 X-Last-TLS-Session-Version: TLSv1.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260907_053334_371868_E76AED6A X-CRM114-Status: GOOD ( 16.94 ) 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 SGVsbG8sCgpPbiAwNy8wOS8yMDI2IGF0IDE5OjEwOjQwICswOCwgZnp6IDwxNzY4MzE1MzA3QHFx LmNvbT4gd3JvdGU6Cgo+IFdoZW4gc3F1YXNoZnMgcmVhZHMgZmlsZXMgdGhyb3VnaCBtdGRibG9j aywgdGhlIG10ZGJsb2NrIGxheWVyCj4gc3BsaXRzIEkvTyBpbnRvIDUxMi1ieXRlIHNlY3RvcnMu IEZvciBhIDRLLXBhZ2UgU1BJIE5BTkQsIHRoaXMKPiBtZWFucyByZWFkaW5nIHRoZSBzYW1lIHBh Z2UgOCB0aW1lcyAoNDA5NiAvIDUxMiksIGdlbmVyYXRpbmcgN3gKPiByZWR1bmRhbnQgU1BJIHJl YWQtZnJvbS1jYWNoZSBvcGVyYXRpb25zLiBFYWNoIHN1Y2ggb3BlcmF0aW9uCj4gaW52b2x2ZXMg YSBmdWxsIFNQSSBidXMgdHJhbnNhY3Rpb24sIHNpZ25pZmljYW50bHkgc2xvd2luZyBkb3duCj4g Ym9vdCB0aW1lIGFuZCBmaWxlIGFjY2Vzcy4KPgo+IENhY2hlIHRoZSBsYXN0IHN1Y2Nlc3NmdWxs eSByZWFkIHBhZ2UgaW4gc3BpbmFuZF9kZXZpY2UgdG8gYXZvaWQKPiB0aGVzZSByZWR1bmRhbnQg b3BlcmF0aW9ucy4gV2hlbiB0aGUgc2FtZSB7dGFyZ2V0LCBlcmFzZWJsb2NrLAo+IHBhZ2V9IGlz IHJlcXVlc3RlZCBjb25zZWN1dGl2ZWx5LCB0aGUgZGF0YSBpcyBzZXJ2ZWQgZGlyZWN0bHkKPiBm cm9tIHRoZSBib3VuY2UgYnVmZmVyIChkYXRhYnVmKSB2aWEgbWVtY3B5LCBza2lwcGluZyB0aGUg U1BJCj4gdHJhbnNhY3Rpb24gZW50aXJlbHkuCj4KPiBUaGUgY2FjaGUgaXMgaW52YWxpZGF0ZWQg b24gd3JpdGUgYW5kIGVyYXNlIG9wZXJhdGlvbnMuIFJBVyByZWFkcywKPiBPT0IgcmVhZHMsIGFu ZCBjb250aW51b3VzIHJlYWRzIGFyZSBleGNsdWRlZCBmcm9tIGNhY2hpbmcgdG8KPiBtYWludGFp biBjb3JyZWN0bmVzcy4KCldoeSB3b3VsZCB5b3UgdXNlIG10ZGJsb2NrIG9uIHRvcCBvZiBhIFNQ SSBOQU5EPyBJdCBzb3VuZHMgbGlrZSBhIHZlcnkKYmFkIGNob2ljZS4KCk1heWJlIG10ZGJsb2Nr IGl0c2VsZiBjb3VsZCBiZSBpbXByb3ZlZCB0byBhdm9pZCA1MTJCIGFjY2Vzc2VzIGluc3RlYWQ/ Cgo+IFNpZ25lZC1vZmYtYnk6IGZ6eiA8MTc2ODMxNTMwN0BxcS5jb20+CgpVbmZvcnR1bmF0ZWx5 LCBmb3IgbGljZW5zaW5nIGFuZCBjb3B5cmlnaHQgcmVhc29ucywgcHNldWRvbnltcyBhcmUgbm90 CmFsbG93ZWQgaW4gdGhlIExpbnV4IGtlcm5lbC4KCj4gLS0tCj4gIGRyaXZlcnMvbXRkL25hbmQv c3BpL2NvcmUuYyB8IDM2ICsrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrLQo+ICBp bmNsdWRlL2xpbnV4L210ZC9zcGluYW5kLmggfCAgOSArKysrKysrKysKPiAgMiBmaWxlcyBjaGFu Z2VkLCA0NCBpbnNlcnRpb25zKCspLCAxIGRlbGV0aW9uKC0pCj4KPiBkaWZmIC0tZ2l0IGEvZHJp dmVycy9tdGQvbmFuZC9zcGkvY29yZS5jIGIvZHJpdmVycy9tdGQvbmFuZC9zcGkvY29yZS5jCj4g aW5kZXggOGJmOTMwMWYyNWU3Li5mYzA4MjEyN2JkYTggMTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy9t dGQvbmFuZC9zcGkvY29yZS5jCj4gKysrIGIvZHJpdmVycy9tdGQvbmFuZC9zcGkvY29yZS5jCj4g QEAgLTU1Nyw3ICs1NTcsMTQgQEAgc3RhdGljIGludCBzcGluYW5kX3JlYWRfZnJvbV9jYWNoZV9v cChzdHJ1Y3Qgc3BpbmFuZF9kZXZpY2UgKnNwaW5hbmQsCj4gIAkJCQkJCSAgICByZXEtPm9vYmxl bik7Cj4gIAkJZWxzZQo+ICAJCQltZW1jcHkocmVxLT5vb2JidWYuaW4sIHNwaW5hbmQtPm9vYmJ1 ZiArIHJlcS0+b29ib2ZmcywKPiAtCQkJICAgICAgIHJlcS0+b29ibGVuKTsKPiArCQkJCXJlcS0+ b29ibGVuKTsKClNwdXJpb3VzIGNoYW5nZS4KCj4gKwl9Cj4gKwoKVGhhbmtzLApNaXF1w6hsCgpf X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTGlu dXggTVREIGRpc2N1c3Npb24gbWFpbGluZyBsaXN0Cmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3Jn L21haWxtYW4vbGlzdGluZm8vbGludXgtbXRkLwo=