linux-kernel - [PATCH 09/29] x86/boot/e820: Call the PCI gap a 'gap' in the boot log printout

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Message-ID: <20250421185210.3372306-10-mingo@kernel.org>
Date: Mon, 21 Apr 2025 20:51:49 +0200
From: Ingo Molnar <mingo@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: 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>,
	Ingo Molnar <mingo@...nel.org>,
	David Woodhouse <dwmw@...zon.co.uk>
Subject: [PATCH 09/29] 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: David Woodhouse <dwmw@...zon.co.uk>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Kees Cook <keescook@...omium.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Mike Rapoport (Microsoft) <rppt@...nel.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 99f997ae88dc..3eab0908ca71 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -741,7 +741,7 @@ __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);
 }
 
-- 
2.45.2