Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=43fb2387d0774a36f450b50d538cee84cf83858e
Commit: 43fb2387d0774a36f450b50d538cee84cf83858e
Parent: d3f7eae182b04997be19343a23f7009170f4f7a5
Author: Andi Kleen <[EMAIL PROTECTED]>
AuthorDate: Fri Aug 10 22:31:08 2007 +0200
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Sat Aug 11 15:58:14 2007 -0700
i386: Add warning in Documentation that zero-page is not a stable ABI
Some people writing boot loaders seem to falsely belief the 32bit zero page
is a
stable interface for out of tree code like the real mode boot protocol. Add
a comment
clarifying that is not true.
Signed-off-by: Andi Kleen <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
Documentation/i386/zero-page.txt | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/Documentation/i386/zero-page.txt b/Documentation/i386/zero-page.txt
index 75b3680..6c0817c 100644
--- a/Documentation/i386/zero-page.txt
+++ b/Documentation/i386/zero-page.txt
@@ -1,3 +1,13 @@
+---------------------------------------------------------------------------
+!!!!!!!!!!!!!!!WARNING!!!!!!!!
+The zero page is a kernel internal data structure, not a stable ABI. It might
change
+without warning and the kernel has no way to detect old version of it.
+If you're writing some external code like a boot loader you should only use
+the stable versioned real mode boot protocol described in boot.txt. Otherwise
the kernel
+might break you at any time.
+!!!!!!!!!!!!!WARNING!!!!!!!!!!!
+----------------------------------------------------------------------------
+
Summary of boot_params layout (kernel point of view)
( collected by Hans Lermen and Martin Mares )
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