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Subject[PATCHv1 2/2] Documentation/kbuild/headers_install.txt: update documentation
Documentation in kbuild/headers_install.txt is not
up to date regarding:
- way to list the various architectures;
- path where the headers are installed.

This patch try to fix these issues.

Cc: Kirill A. Shutemov <>
Cc: Michal Marek <>
Cc: David Woodhouse <>
Cc: Rob Landley <>
Cc: Sam Ravnborg <>
Signed-off-by: Yann Droneaud <>
Documentation/kbuild/headers_install.txt | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/Documentation/kbuild/headers_install.txt b/Documentation/kbuild/headers_install.txt
index 951eb9f1e040..8b6751f10dd3 100644
--- a/Documentation/kbuild/headers_install.txt
+++ b/Documentation/kbuild/headers_install.txt
@@ -24,23 +24,24 @@ The "make headers_install" command can be run in the top level directory of the
kernel source code (or using a standard out-of-tree build). It takes two
optional arguments:

- make headers_install ARCH=i386 INSTALL_HDR_PATH=/usr/include
+ make headers_install ARCH=i386 INSTALL_HDR_PATH=/usr

ARCH indicates which architecture to produce headers for, and defaults to the
-current architecture. The linux/asm directory of the exported kernel headers
-is platform-specific, to see a complete list of supported architectures use
+current architecture. The asm/ directory of the exported kernel headers
+is platform-specific, to see a list of supported architectures use
the command:

- ls -d include/asm-* | sed 's/.*-//'
+ /bin/ls -1 arch/*/include/asm/Kbuild | sed -e 's,^arch/,,' \
+ -e 's,/include/asm/Kbuild$,,'

-INSTALL_HDR_PATH indicates where to install the headers. It defaults to
+INSTALL_HDR_PATH indicates where to create include/ directory to install the
+headers. It defaults to "./usr/".

The command "make headers_install_all" exports headers for all architectures
simultaneously. (This is mostly of interest to distribution maintainers,
who create an architecture-independent tarball from the resulting include
directory.) You also can use HDR_ARCH_LIST to specify list of architectures.
-Remember to provide the appropriate linux/asm directory via "mv" or "ln -s"
+Remember to provide the appropriate asm/ directory via "mv" or "ln -s"
before building a C library with headers exported this way.

The kernel header export infrastructure is maintained by David Woodhouse

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