linux-kernel - [tip: x86/boot] x86/boot/e820: Simplify & clarify __e820__range

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Message-ID: <176570144497.498.7293501390230041149.tip-bot2@tip-bot2>
Date: Sun, 14 Dec 2025 08:37:24 -0000
From: "tip-bot2 for Ingo Molnar" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Ingo Molnar <mingo@...nel.org>, "H . Peter Anvin" <hpa@...or.com>,
 Andy Shevchenko <andy@...nel.org>, Arnd Bergmann <arnd@...nel.org>,
 David Woodhouse <dwmw@...zon.co.uk>, Juergen Gross <jgross@...e.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>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject:
 [tip: x86/boot] x86/boot/e820: Simplify & clarify __e820__range_add() a bit

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

Commit-ID:     7df2f811b275e6067f7e15a966a2b6ff22a4edfc
Gitweb:        https://git.kernel.org/tip/7df2f811b275e6067f7e15a966a2b6ff22a4edfc
Author:        Ingo Molnar <mingo@...nel.org>
AuthorDate:    Thu, 15 May 2025 14:05:39 +02:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Sun, 14 Dec 2025 09:19:41 +01:00

x86/boot/e820: Simplify & clarify __e820__range_add() a bit

Use 'entry_new' to make clear we are allocating a new entry.

Change the table-full message to say that the table is full.

Signed-off-by: Ingo Molnar <mingo@...nel.org>
Cc: H . Peter Anvin <hpa@...or.com>
Cc: Andy Shevchenko <andy@...nel.org>
Cc: Arnd Bergmann <arnd@...nel.org>
Cc: David Woodhouse <dwmw@...zon.co.uk>
Cc: Juergen Gross <jgross@...e.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>
Link: https://patch.msgid.link/20250515120549.2820541-24-mingo@kernel.org
---
 arch/x86/kernel/e820.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index f582802..4758099 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -165,16 +165,19 @@ int e820__get_entry_type(u64 start, u64 end)
 static void __init __e820__range_add(struct e820_table *table, u64 start, u64 size, enum e820_type type)
 {
 	u32 idx = table->nr_entries;
+	struct e820_entry *entry_new;

 	if (idx >= ARRAY_SIZE(table->entries)) {
-		pr_err("too many E820 table entries; ignoring [mem %#010llx-%#010llx]\n",
+		pr_err("E820 table full; ignoring [mem %#010llx-%#010llx]\n",
 		       start, start + size-1);
 		return;
 	}

-	table->entries[idx].addr = start;
-	table->entries[idx].size = size;
-	table->entries[idx].type = type;
+	entry_new = table->entries + idx;
+
+	entry_new->addr = start;
+	entry_new->size = size;
+	entry_new->type = type;

 	table->nr_entries++;
 }