linux-kernel - [PATCH] x86: add RESERVE_BRK

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Message-ID: <4C805EEA.1080205@goop.org>
Date:	Thu, 02 Sep 2010 19:35:22 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86: add RESERVE_BRK_ARRAY() helper

Useful when converting static arrays into boot-time brk allocated objects.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>

diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h
index 4093d1e..632cafd 100644
--- a/arch/x86/include/asm/setup.h
+++ b/arch/x86/include/asm/setup.h
@@ -126,6 +126,11 @@ void *extend_brk(size_t size, size_t align);
 			: : "i" (sz));					\
 	}

+/* Helper for reserving space for arrays of things */
+#define RESERVE_BRK_ARRAY(type, name, entries)		\
+	type *name;					\
+	RESERVE_BRK(name, sizeof(type) * entries)
+
 #ifdef __i386__

 void __init i386_start_kernel(void);

View attachment "x86-brk-array.patch" of type "text/plain" (865 bytes)