X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=Documentation%2Fsparse.txt;h=1a3bdc27d95e98ce49c07791b02515e38ef678a5;hb=e06cea4cb4a16076dfca4863b12e1c4aeb781c8d;hp=3f1c5464b1c9f1206dd497e891e1bd6e691d15fb;hpb=b8cbfa692485bf7568eda3d2f37545a76efb7c93;p=pandora-kernel.git diff --git a/Documentation/sparse.txt b/Documentation/sparse.txt index 3f1c5464b1c9..1a3bdc27d95e 100644 --- a/Documentation/sparse.txt +++ b/Documentation/sparse.txt @@ -1,5 +1,6 @@ Copyright 2004 Linus Torvalds Copyright 2004 Pavel Machek +Copyright 2006 Bob Copeland Using sparse for typechecking ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -41,23 +42,20 @@ sure that bitwise types don't get mixed up (little-endian vs big-endian vs cpu-endian vs whatever), and there the constant "0" really _is_ special. -Use +Getting sparse +~~~~~~~~~~~~~~ - make C=[12] CF=-Wbitwise +You can get latest released versions from the Sparse homepage at +http://www.kernel.org/pub/linux/kernel/people/josh/sparse/ -or you don't get any checking at all. +Alternatively, you can get snapshots of the latest development version +of sparse using git to clone.. + git://git.kernel.org/pub/scm/linux/kernel/git/josh/sparse.git -Where to get sparse -~~~~~~~~~~~~~~~~~~~ +DaveJ has hourly generated tarballs of the git tree available at.. -With git, you can just get it from - - rsync://rsync.kernel.org/pub/scm/devel/sparse/sparse.git - -and DaveJ has tar-balls at - - http://www.codemonkey.org.uk/projects/git-snapshots/sparse/ + http://www.codemonkey.org.uk/projects/git-snapshots/sparse/ Once you have it, just do @@ -65,8 +63,20 @@ Once you have it, just do make make install -as your regular user, and it will install sparse in your ~/bin directory. -After that, doing a kernel make with "make C=1" will run sparse on all the -C files that get recompiled, or with "make C=2" will run sparse on the -files whether they need to be recompiled or not (ie the latter is fast way -to check the whole tree if you have already built it). +as a regular user, and it will install sparse in your ~/bin directory. + +Using sparse +~~~~~~~~~~~~ + +Do a kernel make with "make C=1" to run sparse on all the C files that get +recompiled, or use "make C=2" to run sparse on the files whether they need to +be recompiled or not. The latter is a fast way to check the whole tree if you +have already built it. + +The optional make variable CHECKFLAGS can be used to pass arguments to sparse. +The build system passes -Wbitwise to sparse automatically. To perform +endianness checks, you may define __CHECK_ENDIAN__: + + make C=2 CHECKFLAGS="-D__CHECK_ENDIAN__" + +These checks are disabled by default as they generate a host of warnings.