linux-kernel - [PATCH RFC v3 0/8] kernel-hacking: introduce CONFIG_NO_AUTO

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Message-Id: <20250429-noautoinline-v3-0-4c49f28ea5b5@uniontech.com>
Date: Tue, 29 Apr 2025 12:06:04 +0800
From: Chen Linxuan via B4 Relay <devnull+chenlinxuan.uniontech.com@...nel.org>
To: Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...nel.dk>, 
 Christoph Hellwig <hch@....de>, Sagi Grimberg <sagi@...mberg.me>, 
 Andrew Morton <akpm@...ux-foundation.org>, 
 Yishai Hadas <yishaih@...dia.com>, Jason Gunthorpe <jgg@...pe.ca>, 
 Shameer Kolothum <shameerali.kolothum.thodi@...wei.com>, 
 Kevin Tian <kevin.tian@...el.com>, 
 Alex Williamson <alex.williamson@...hat.com>, 
 Peter Huewe <peterhuewe@....de>, Jarkko Sakkinen <jarkko@...nel.org>, 
 Masahiro Yamada <masahiroy@...nel.org>, 
 Nathan Chancellor <nathan@...nel.org>, 
 Nicolas Schier <nicolas.schier@...ux.dev>, 
 Nick Desaulniers <nick.desaulniers+lkml@...il.com>, 
 Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>, 
 Vlastimil Babka <vbabka@...e.cz>, Suren Baghdasaryan <surenb@...gle.com>, 
 Michal Hocko <mhocko@...e.com>, Brendan Jackman <jackmanb@...gle.com>, 
 Johannes Weiner <hannes@...xchg.org>, Zi Yan <ziy@...dia.com>, 
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, 
 Peter Zijlstra <peterz@...radead.org>, 
 "Paul E. McKenney" <paulmck@...nel.org>, Boqun Feng <boqun.feng@...il.com>, 
 Dmitry Vyukov <dvyukov@...gle.com>, Andrey Konovalov <andreyknvl@...il.com>, 
 Juergen Gross <jgross@...e.com>, 
 Boris Ostrovsky <boris.ostrovsky@...cle.com>, 
 Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, 
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, 
 x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>
Cc: linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 linux-mm@...ck.org, kvm@...r.kernel.org, virtualization@...ts.linux.dev, 
 linux-integrity@...r.kernel.org, linux-kbuild@...r.kernel.org, 
 llvm@...ts.linux.dev, Winston Wen <wentao@...ontech.com>, 
 kasan-dev@...glegroups.com, xen-devel@...ts.xenproject.org, 
 Chen Linxuan <chenlinxuan@...ontech.com>, 
 Changbin Du <changbin.du@...el.com>
Subject: [PATCH RFC v3 0/8] kernel-hacking: introduce CONFIG_NO_AUTO_INLINE

This series introduces a new kernel configuration option NO_AUTO_INLINE,
which can be used to disable the automatic inlining of functions.

This will allow the function tracer to trace more functions
because it only traces functions that the compiler has not inlined.

Previous discussions can be found at

Link: https://lore.kernel.org/all/20181028130945.23581-3-changbin.du@gmail.com/

This patch depends on

  [PATCH] drm/i915/pxp: fix undefined reference to
          `intel_pxp_gsccs_is_ready_for_sessions'

which can be found at

  https://lore.kernel.org/all/20250415090616.2649889-1-jani.nikula@intel.com/

as well as

  [RFC PATCH 5/7] RDMA/hns: initialize db in update_srq_db()

which can be found at

  https://lore.kernel.org/all/FF922C77946229B6+20250411105459.90782-5-chenlinxuan@uniontech.com/

Signed-off-by: Chen Linxuan <chenlinxuan@...ontech.com>
---
Changes in v3:
- Fix some modpost and objtool warnings
- Try support clang as Bart Van Assche suggested.
- Remove architecture depends as Bart Van Assche suggested.
- Link to v2: https://lore.kernel.org/r/20250416-noautoinline-v2-0-e69a2717530f@uniontech.com

Changes in v2:
- Resend via b4 to correct Message-ID and recipients.
- Update commit message following suggestions from Jarkko Sakkinen 
- Link to v1: https://lore.kernel.org/r/31F42D8141CDD2D0+20250411105142.89296-1-chenlinxuan@uniontech.com

---
Chen Linxuan (4):
      rseq: add __always_inline for rseq_kernel_fields
      kcov: add __always_inline for canonicalize_ip
      x86/xen: add __init for xen_pgd_walk
      lib/Kconfig.debug: introduce CONFIG_NO_AUTO_INLINE

Winston Wen (4):
      nvme: add __always_inline for nvme_pci_npages_prp
      mm: add __always_inline for page_contains_unaccepted
      vfio/virtio: add __always_inline for virtiovf_get_device_config_size
      tpm: add __always_inline for tpm_is_hwrng_enabled

 Makefile                            | 16 ++++++++++++++++
 arch/x86/xen/mmu_pv.c               |  2 +-
 drivers/char/tpm/tpm-chip.c         |  2 +-
 drivers/nvme/host/pci.c             |  2 +-
 drivers/vfio/pci/virtio/legacy_io.c |  2 +-
 kernel/kcov.c                       |  2 +-
 kernel/rseq.c                       |  2 +-
 lib/Kconfig.debug                   | 21 +++++++++++++++++++++
 lib/Makefile                        |  3 +++
 mm/page_alloc.c                     |  2 +-
 10 files changed, 47 insertions(+), 7 deletions(-)
---
base-commit: ca91b9500108d4cf083a635c2e11c884d5dd20ea
change-id: 20250416-noautoinline-8e9b9e535452

Best regards,
-- 
Chen Linxuan <chenlinxuan@...ontech.com>