From 5a0e3ad6af8660be21ca98a971cd00f331318c05 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 24 Mar 2010 17:04:11 +0900 Subject: include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo Guess-its-ok-by: Christoph Lameter Cc: Ingo Molnar Cc: Lee Schermerhorn --- fs/ubifs/commit.c | 1 + fs/ubifs/debug.c | 1 + fs/ubifs/file.c | 1 + fs/ubifs/gc.c | 1 + fs/ubifs/io.c | 1 + fs/ubifs/lpt.c | 1 + fs/ubifs/lpt_commit.c | 1 + fs/ubifs/recovery.c | 1 + fs/ubifs/sb.c | 1 + fs/ubifs/tnc.c | 1 + fs/ubifs/ubifs.h | 1 + fs/ubifs/xattr.c | 1 + 12 files changed, 12 insertions(+) (limited to 'fs/ubifs') diff --git a/fs/ubifs/commit.c b/fs/ubifs/commit.c index 4775af401167..37fa7ed062d8 100644 --- a/fs/ubifs/commit.c +++ b/fs/ubifs/commit.c @@ -45,6 +45,7 @@ #include #include +#include #include "ubifs.h" /** diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c index 90492327b383..c2a68baa782f 100644 --- a/fs/ubifs/debug.c +++ b/fs/ubifs/debug.c @@ -34,6 +34,7 @@ #include #include #include +#include #ifdef CONFIG_UBIFS_FS_DEBUG diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c index e26c02ab6cd5..5692cf72b807 100644 --- a/fs/ubifs/file.c +++ b/fs/ubifs/file.c @@ -52,6 +52,7 @@ #include "ubifs.h" #include #include +#include static int read_block(struct inode *inode, void *addr, unsigned int block, struct ubifs_data_node *dn) diff --git a/fs/ubifs/gc.c b/fs/ubifs/gc.c index e5a3d8e96bb7..918d1582ca05 100644 --- a/fs/ubifs/gc.c +++ b/fs/ubifs/gc.c @@ -53,6 +53,7 @@ * good, and GC takes extra care when moving them. */ +#include #include #include #include "ubifs.h" diff --git a/fs/ubifs/io.c b/fs/ubifs/io.c index e589fedaf1ef..77d5cf4a7547 100644 --- a/fs/ubifs/io.c +++ b/fs/ubifs/io.c @@ -51,6 +51,7 @@ */ #include +#include #include "ubifs.h" /** diff --git a/fs/ubifs/lpt.c b/fs/ubifs/lpt.c index b2792e84d245..ad7f67b827ea 100644 --- a/fs/ubifs/lpt.c +++ b/fs/ubifs/lpt.c @@ -46,6 +46,7 @@ #include "ubifs.h" #include #include +#include /** * do_calc_lpt_geom - calculate sizes for the LPT area. diff --git a/fs/ubifs/lpt_commit.c b/fs/ubifs/lpt_commit.c index 8cbfb8248025..13cb7a4237bf 100644 --- a/fs/ubifs/lpt_commit.c +++ b/fs/ubifs/lpt_commit.c @@ -26,6 +26,7 @@ */ #include +#include #include "ubifs.h" /** diff --git a/fs/ubifs/recovery.c b/fs/ubifs/recovery.c index 868a55ee080f..109c6ea03bb5 100644 --- a/fs/ubifs/recovery.c +++ b/fs/ubifs/recovery.c @@ -31,6 +31,7 @@ */ #include +#include #include "ubifs.h" /** diff --git a/fs/ubifs/sb.c b/fs/ubifs/sb.c index 57085e43320f..96cb62c8a9dd 100644 --- a/fs/ubifs/sb.c +++ b/fs/ubifs/sb.c @@ -27,6 +27,7 @@ */ #include "ubifs.h" +#include #include #include diff --git a/fs/ubifs/tnc.c b/fs/ubifs/tnc.c index e5b1a7d00fa0..2194915220e5 100644 --- a/fs/ubifs/tnc.c +++ b/fs/ubifs/tnc.c @@ -31,6 +31,7 @@ */ #include +#include #include "ubifs.h" /* diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h index b2d976366a46..bd2542dad014 100644 --- a/fs/ubifs/ubifs.h +++ b/fs/ubifs/ubifs.h @@ -28,6 +28,7 @@ #include #include #include +#include #include #include #include diff --git a/fs/ubifs/xattr.c b/fs/ubifs/xattr.c index 195830f47569..c74400f88fe0 100644 --- a/fs/ubifs/xattr.c +++ b/fs/ubifs/xattr.c @@ -56,6 +56,7 @@ */ #include "ubifs.h" +#include #include #include -- cgit v1.2.3