linux-kernel - [tip: x86/boot] x86/boot/e820: Call the PCI gap a 'gap' in the boot log printout

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Message-ID: <176570146083.498.5412780529928581243.tip-bot2@tip-bot2>
Date: Sun, 14 Dec 2025 08:37:40 -0000
From: "tip-bot2 for Ingo Molnar" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Ingo Molnar <mingo@...nel.org>, Andy Shevchenko <andy@...nel.org>,
 Arnd Bergmann <arnd@...nel.org>, Borislav Petkov <bp@...en8.de>,
 Juergen Gross <jgross@...e.com>, "H . Peter Anvin" <hpa@...or.com>,
 Kees Cook <keescook@...omium.org>,
 Linus Torvalds <torvalds@...ux-foundation.org>,
 Mike Rapoport <rppt@...nel.org>, Paul Menzel <pmenzel@...gen.mpg.de>,
 Peter Zijlstra <peterz@...radead.org>, Thomas Gleixner <tglx@...utronix.de>,
 David Woodhouse <dwmw@...zon.co.uk>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: x86/boot] x86/boot/e820: Call the PCI gap a 'gap' in the boot
 log printout

The following commit has been merged into the x86/boot branch of tip:

Commit-ID:     1d7bc219e2b6176eac361ed2eb11c7a70387644c
Gitweb:        https://git.kernel.org/tip/1d7bc219e2b6176eac361ed2eb11c7a70387644c
Author:        Ingo Molnar <mingo@...nel.org>
AuthorDate:    Thu, 15 May 2025 14:05:25 +02:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Sun, 14 Dec 2025 09:19:38 +01:00

x86/boot/e820: Call the PCI gap a 'gap' in the boot log printout

It is a bit weird and inconsistent that the PCI gap is
advertised during bootup as 'mem'ory:

  [mem 0xc0000000-0xfed1bfff] available for PCI devices
   ^^^

It's not really memory, it's a gap that PCI devices can decode
and use and they often do not map it to any memory themselves.

So advertise it for what it is, a gap:

  [gap 0xc0000000-0xfed1bfff] available for PCI devices

Signed-off-by: Ingo Molnar <mingo@...nel.org>
Cc: Andy Shevchenko <andy@...nel.org>
Cc: Arnd Bergmann <arnd@...nel.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Juergen Gross <jgross@...e.com>
Cc: "H . Peter Anvin" <hpa@...or.com>
Cc: Kees Cook <keescook@...omium.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Mike Rapoport <rppt@...nel.org>
Cc: Paul Menzel <pmenzel@...gen.mpg.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: David Woodhouse <dwmw@...zon.co.uk>
Link: https://patch.msgid.link/20250515120549.2820541-10-mingo@kernel.org
---
 arch/x86/kernel/e820.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index b0efa4b..96840fa 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -699,7 +699,7 @@ __init void e820__setup_pci_gap(void)
 	 */
 	pci_mem_start = gapstart;

-	pr_info("[mem %#010lx-%#010lx] available for PCI devices\n",
+	pr_info("[gap %#010lx-%#010lx] available for PCI devices\n",
 		gapstart, gapstart + gapsize - 1);
 }