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[82.69.66.36]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-47d7f41eb3bsm2991115e9.7.2026.01.05.11.05.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Jan 2026 11:05:05 -0800 (PST) Date: Mon, 5 Jan 2026 19:05:03 +0000 From: David Laight To: Andrew Cooper Cc: ebiggers@kernel.org, Jason@zx2c4.com, ardb@kernel.org, dengler@linux.ibm.com, freude@linux.ibm.com, herbert@gondor.apana.org.au, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org, x86@kernel.org Subject: Re: [PATCH 19/36] Bluetooth: SMP: Use new AES library API Message-ID: <20260105190503.53cc31dd@pumpkin> In-Reply-To: <859377de-cb72-4e87-8ee5-97f8c58a5720@citrix.com> References: <20260105051311.1607207-20-ebiggers@kernel.org> <859377de-cb72-4e87-8ee5-97f8c58a5720@citrix.com> X-Mailer: Claws Mail 4.1.1 (GTK 3.24.38; arm-unknown-linux-gnueabihf) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260105_110507_914746_D09C4209 X-CRM114-Status: GOOD ( 12.07 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, 5 Jan 2026 15:40:22 +0000 Andrew Cooper wrote: > > /* Most significant octet of plaintextData corresponds to data[0] */ > > swap_buf(r, data, 16); > > =20 > > - aes_encrypt(&ctx, data, data); + aes_encrypt_new(&aes, data, data); = =20 >=20 > One thing you might want to consider, which reduces the churn in the seri= es. >=20 > You can use _Generic() to do type-based dispatch on the first pointer.=C2= =A0 > Something like this: >=20 > void aes_encrypt(const struct crypto_aes_ctx *ctx, u8 *out, const u8 *in); > void aes_encrypt_new(aes_encrypt_arg key, u8 out[at_least AES_BLOCK_SIZE], > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 = const u8 in[at_least AES_BLOCK_SIZE]); >=20 > #define aes_encrypt(ctx, out, in)=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 \ > =C2=A0=C2=A0=C2=A0 _Generic(ctx,=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 \ > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 = const struct crypto_aes_ctx *: aes_encrypt(ctx, out, in),=C2=A0 \ > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 = aes_encrypt_arg: aes_encrypt_new(ctx, out, in)) >=20 >=20 > i.e. it keeps the _new()-ism in a single header, without needing to > change the drivers a second time. You'll need to cast the 'ctx' argument in both calls. All the code in an _Generic() must compile cleanly in all the cases. (Totally annoying....) 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[82.69.66.36]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-47d7f41eb3bsm2991115e9.7.2026.01.05.11.05.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Jan 2026 11:05:05 -0800 (PST) Date: Mon, 5 Jan 2026 19:05:03 +0000 From: David Laight To: Andrew Cooper Cc: ebiggers@kernel.org, Jason@zx2c4.com, ardb@kernel.org, dengler@linux.ibm.com, freude@linux.ibm.com, herbert@gondor.apana.org.au, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org, x86@kernel.org Subject: Re: [PATCH 19/36] Bluetooth: SMP: Use new AES library API Message-ID: <20260105190503.53cc31dd@pumpkin> In-Reply-To: <859377de-cb72-4e87-8ee5-97f8c58a5720@citrix.com> References: <20260105051311.1607207-20-ebiggers@kernel.org> <859377de-cb72-4e87-8ee5-97f8c58a5720@citrix.com> X-Mailer: Claws Mail 4.1.1 (GTK 3.24.38; arm-unknown-linux-gnueabihf) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260105_110507_914474_A9C9B807 X-CRM114-Status: GOOD ( 10.45 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org T24gTW9uLCA1IEphbiAyMDI2IDE1OjQwOjIyICswMDAwCkFuZHJldyBDb29wZXIgPGFuZHJldy5j b29wZXIzQGNpdHJpeC5jb20+IHdyb3RlOgoKPiA+ICAJLyogTW9zdCBzaWduaWZpY2FudCBvY3Rl dCBvZiBwbGFpbnRleHREYXRhIGNvcnJlc3BvbmRzIHRvIGRhdGFbMF0gKi8KPiA+ICAJc3dhcF9i dWYociwgZGF0YSwgMTYpOwo+ID4gIAo+ID4gLSBhZXNfZW5jcnlwdCgmY3R4LCBkYXRhLCBkYXRh KTsgKyBhZXNfZW5jcnlwdF9uZXcoJmFlcywgZGF0YSwgZGF0YSk7ICAKPiAKPiBPbmUgdGhpbmcg eW91IG1pZ2h0IHdhbnQgdG8gY29uc2lkZXIsIHdoaWNoIHJlZHVjZXMgdGhlIGNodXJuIGluIHRo ZSBzZXJpZXMuCj4gCj4gWW91IGNhbiB1c2UgX0dlbmVyaWMoKSB0byBkbyB0eXBlLWJhc2VkIGRp c3BhdGNoIG9uIHRoZSBmaXJzdCBwb2ludGVyLsKgCj4gU29tZXRoaW5nIGxpa2UgdGhpczoKPiAK PiB2b2lkIGFlc19lbmNyeXB0KGNvbnN0IHN0cnVjdCBjcnlwdG9fYWVzX2N0eCAqY3R4LCB1OCAq b3V0LCBjb25zdCB1OCAqaW4pOwo+IHZvaWQgYWVzX2VuY3J5cHRfbmV3KGFlc19lbmNyeXB0X2Fy ZyBrZXksIHU4IG91dFthdF9sZWFzdCBBRVNfQkxPQ0tfU0laRV0sCj4gwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgIGNvbnN0IHU4IGluW2F0X2xlYXN0IEFFU19CTE9DS19TSVpFXSk7Cj4gCj4gI2Rl ZmluZSBhZXNfZW5jcnlwdChjdHgsIG91dCwgaW4pwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBcCj4gwqDC oMKgIF9HZW5lcmljKGN0eCzCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqAgXAo+IMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBjb25zdCBzdHJ1Y3QgY3J5 cHRvX2Flc19jdHggKjogYWVzX2VuY3J5cHQoY3R4LCBvdXQsIGluKSzCoCBcCj4gwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgIGFlc19lbmNyeXB0X2FyZzogYWVzX2VuY3J5cHRfbmV3KGN0eCwgb3V0 LCBpbikpCj4gCj4gCj4gaS5lLiBpdCBrZWVwcyB0aGUgX25ldygpLWlzbSBpbiBhIHNpbmdsZSBo ZWFkZXIsIHdpdGhvdXQgbmVlZGluZyB0bwo+IGNoYW5nZSB0aGUgZHJpdmVycyBhIHNlY29uZCB0 aW1lLgoKWW91J2xsIG5lZWQgdG8gY2FzdCB0aGUgJ2N0eCcgYXJndW1lbnQgaW4gYm90aCBjYWxs cy4KQWxsIHRoZSBjb2RlIGluIGFuIF9HZW5lcmljKCkgbXVzdCBjb21waWxlIGNsZWFubHkgaW4g YWxsIHRoZSBjYXNlcy4KKFRvdGFsbHkgYW5ub3lpbmcuLi4uKQoKCURhdmlkCgo+IAo+IH5BbmRy ZXcKPiAKCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwps aW51eC1yaXNjdiBtYWlsaW5nIGxpc3QKbGludXgtcmlzY3ZAbGlzdHMuaW5mcmFkZWFkLm9yZwpo dHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LXJpc2N2Cg==