From: Peter Zijlstra <peterz@infradead.org>
To: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
Mark Rutland <mark.rutland@arm.com>,
Jason Baron <jbaron@akamai.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ard Biesheuvel <ardb@kernel.org>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <seanjc@google.com>,
Sami Tolvanen <samitolvanen@google.com>,
Nick Desaulniers <ndesaulniers@google.com>,
Will McVicker <willmcvicker@google.com>,
Kees Cook <keescook@chromium.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 09/11] static_call: Make NULL static calls consistent
Date: Wed, 22 Mar 2023 15:45:45 +0100 [thread overview]
Message-ID: <20230322144545.GE2357380@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <7638861ae89606b1277ad4235654bba2b880f313.1679456900.git.jpoimboe@kernel.org>
On Tue, Mar 21, 2023 at 09:00:15PM -0700, Josh Poimboeuf wrote:
> + * or using static_call_update() with a NULL function pointer. In both cases
> + * the HAVE_STATIC_CALL implementation will patch the trampoline with a RET
> +* instruction, instead of an immediate tail-call JMP. HAVE_STATIC_CALL_INLINE
> +* architectures can patch the trampoline call to a NOP.
> *
> * In all cases, any argument evaluation is unconditional. Unlike a regular
> * conditional function pointer call:
you wrecked the indent there ;-)
next prev parent reply other threads:[~2023-03-22 14:48 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-22 4:00 [PATCH v2 00/11] static_call: Improve NULL/ret0 handling Josh Poimboeuf
2023-03-22 4:00 ` [PATCH v2 01/11] static_call: Improve key type abstraction Josh Poimboeuf
2023-03-22 4:53 ` Josh Poimboeuf
2023-03-22 5:02 ` [PATCH v2.1 " Josh Poimboeuf
2023-03-22 4:00 ` [PATCH v2 02/11] static_call: Flip key type union bit Josh Poimboeuf
2023-03-22 5:03 ` [PATCH v2.1 " Josh Poimboeuf
2023-03-22 4:00 ` [PATCH v2 03/11] static_call: Remove static_call_mod_init() declaration Josh Poimboeuf
2023-03-22 4:00 ` [PATCH v2 04/11] static_call: Remove static_call.h dependency on cpu.h Josh Poimboeuf
2023-03-22 4:00 ` [PATCH v2 05/11] static_call: Make ARCH_ADD_TRAMP_KEY() generic Josh Poimboeuf
2023-03-22 4:00 ` [PATCH v2 06/11] static_call: "EXPORT_STATIC_CALL_TRAMP" -> "EXPORT_STATIC_CALL_RO" Josh Poimboeuf
2023-03-22 4:00 ` [PATCH v2 07/11] static_call: Reorganize static call headers Josh Poimboeuf
2023-03-22 4:00 ` [PATCH v2 08/11] arm64/static_call: Fix static call CFI violations Josh Poimboeuf
2023-03-22 12:22 ` Mark Rutland
2023-03-22 14:19 ` Peter Zijlstra
2023-03-22 18:26 ` Josh Poimboeuf
2023-03-22 18:09 ` Josh Poimboeuf
2023-03-22 18:07 ` Sami Tolvanen
2023-03-22 18:33 ` Josh Poimboeuf
2023-03-22 4:00 ` [PATCH v2 09/11] static_call: Make NULL static calls consistent Josh Poimboeuf
2023-03-22 14:45 ` Peter Zijlstra [this message]
2023-03-22 14:59 ` Peter Zijlstra
2023-03-22 18:35 ` Josh Poimboeuf
2023-03-22 15:04 ` Christophe Leroy
2023-03-22 4:00 ` [PATCH v2 10/11] static_call: Remove static_call_cond() Josh Poimboeuf
2023-03-22 4:00 ` [PATCH v2 11/11] static_call: Remove DEFINE_STATIC_CALL_RET0() Josh Poimboeuf
2023-03-22 15:04 ` Christophe Leroy
2023-03-22 18:50 ` Josh Poimboeuf
2023-03-22 15:15 ` Peter Zijlstra
2023-03-22 18:45 ` Josh Poimboeuf
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