From: Xin Li <xin@zytor.com>
To: "Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
kvm@vger.kernel.org, linux-perf-users@vger.kernel.org,
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dapeng1.mi@linux.intel.com
Subject: Re: [PATCH v4 01/15] x86/msr: Add missing includes of <asm/msr.h>
Date: Wed, 30 Apr 2025 10:34:42 -0700 [thread overview]
Message-ID: <480f6bf5-20ea-47a0-a1be-3f3cf15227b6@zytor.com> (raw)
In-Reply-To: <d1bf0657-1cc5-b6ec-5601-f31efefacd9a@linux.intel.com>
On 4/30/2025 2:17 AM, Ilpo Järvinen wrote:
> While this is not my subsystem so don't have the final say here, you had
> to explain quite much to prove that (and reviewer would have to go through
> the same places to check). Wouldn't it be much simpler for all if all
> those .c files would just include <asm/msr.h> directly? No need to explain
> anything then.
>
> Also, similar to what you're doing for some tsc related things in this
> series, somebody could in the future decide that hey, these static inline
> functions (that use .*msr.*) belong to some other file, allowing msr.h to
> be removed from arch/x86/events/perf_event.h. Again, we'd need to add
> asm/msr.h into more .c files. This is the problem with relying on indirect
> includes, they create hard to track dependencies for #includes done in .h
> files. If we actively encourage to depend on indirect #include
> dependencies like that, it makes it very hard to_remove_ any #include
> from a header file (as you have yourself discovered).
You're right, it makes a lot of sense from maintenance point of view.
next prev parent reply other threads:[~2025-04-30 17:36 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-27 9:20 [PATCH v4 00/15] MSR code cleanup part one Xin Li (Intel)
2025-04-27 9:20 ` [PATCH v4 01/15] x86/msr: Add missing includes of <asm/msr.h> Xin Li (Intel)
2025-04-29 9:45 ` Ilpo Järvinen
2025-04-29 17:27 ` Xin Li
2025-04-30 4:20 ` Michael Kelley
2025-04-30 9:12 ` Xin Li
2025-04-30 8:41 ` Xin Li
2025-04-30 9:17 ` Ilpo Järvinen
2025-04-30 17:34 ` Xin Li [this message]
2025-05-01 5:42 ` [PATCH v4A " Xin Li (Intel)
2025-05-02 13:13 ` Ilpo Järvinen
2025-05-02 17:50 ` Xin Li
2025-04-27 9:20 ` [PATCH v4 02/15] x86/msr: Move rdtsc{,_ordered}() to <asm/tsc.h> Xin Li (Intel)
2025-05-02 8:02 ` Ingo Molnar
2025-05-02 18:09 ` Xin Li
2025-05-02 8:18 ` Ingo Molnar
2025-05-02 18:01 ` Xin Li
2025-05-02 8:52 ` Ingo Molnar
2025-05-02 18:00 ` Xin Li
2025-04-27 9:20 ` [PATCH v4 03/15] x86/msr: Remove rdpmc() Xin Li (Intel)
2025-04-27 9:20 ` [PATCH v4 04/15] x86/msr: Rename rdpmcl() to rdpmc() Xin Li (Intel)
2025-04-27 9:20 ` [PATCH v4 05/15] x86/msr: Convert the rdpmc() macro into an always inline function Xin Li (Intel)
2025-04-27 9:20 ` [PATCH v4 06/15] x86/xen/msr: Return u64 consistently in Xen PMC read functions Xin Li (Intel)
2025-04-27 9:20 ` [PATCH v4 07/15] x86/msr: Convert __wrmsr() uses to native_wrmsr{,q}() uses Xin Li (Intel)
2025-04-27 9:20 ` [PATCH v4 08/15] x86/msr: Add the native_rdmsrq() helper Xin Li (Intel)
2025-04-27 9:20 ` [PATCH v4 09/15] x86/msr: Convert __rdmsr() uses to native_rdmsrq() uses Xin Li (Intel)
2025-04-27 9:20 ` [PATCH v4 10/15] x86/xen/msr: Remove calling native_{read,write}_msr{,_safe}() in pmu_msr_{read,write}() Xin Li (Intel)
2025-05-02 8:30 ` Ingo Molnar
2025-04-27 9:20 ` [PATCH v4 11/15] x86/xen/msr: Remove pmu_msr_{read,write}() Xin Li (Intel)
2025-04-27 9:20 ` [PATCH v4 12/15] x86/xen/msr: Remove the error pointer argument from set_seg() Xin Li (Intel)
2025-04-27 9:20 ` [PATCH v4 13/15] x86/pvops/msr: refactor pv_cpu_ops.write_msr{,_safe}() Xin Li (Intel)
2025-04-27 9:20 ` [PATCH v4 14/15] x86/msr: Replace wrmsr(msr, low, 0) with wrmsrq(msr, low) Xin Li (Intel)
2025-04-27 9:20 ` [PATCH v4 15/15] x86/msr: Change the function type of native_read_msr_safe() Xin Li (Intel)
2025-05-02 14:13 ` [PATCH v4 00/15] MSR code cleanup part one Michael Kelley
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