kbuild: use $(src) instead of $(srctree)/$(src) for source directory

Kbuild conventionally uses $(obj)/ for generated files, and $(src)/ for
checked-in source files. It is merely a convention withou

kbuild: use $(src) instead of $(srctree)/$(src) for source directory

Kbuild conventionally uses $(obj)/ for generated files, and $(src)/ for
checked-in source files. It is merely a convention without any functional
difference. In fact, $(obj) and $(src) are exactly the same, as defined
in scripts/Makefile.build:

src := $(obj)

When the kernel is built in a separate output directory, $(src) does
not accurately reflect the source directory location. While Kbuild
resolves this discrepancy by specifying VPATH=$(srctree) to search for
source files, it does not cover all cases. For example, when adding a
header search path for local headers, -I$(srctree)/$(src) is typically
passed to the compiler.

This introduces inconsistency between upstream and downstream Makefiles
because $(src) is used instead of $(srctree)/$(src) for the latter.

To address this inconsistency, this commit changes the semantics of
$(src) so that it always points to the directory in the source tree.

Going forward, the variables used in Makefiles will have the following
meanings:

$(obj) - directory in the object tree
$(src) - directory in the source tree (changed by this commit)
$(objtree) - the top of the kernel object tree
$(srctree) - the top of the kernel source tree

Consequently, $(srctree)/$(src) in upstream Makefiles need to be replaced
with $(src).

Signed-off-by: Masahiro Yamada <[email protected]>
Reviewed-by: Nicolas Schier <[email protected]>

show more ...

dm vdo: remove all sysfs interfaces

Also update target major version number.

All info is (or will be) accessible through alternative interfaces
(e.g. "dmsetup message", module params, etc).

Signed

dm vdo: remove all sysfs interfaces

Also update target major version number.

All info is (or will be) accessible through alternative interfaces
(e.g. "dmsetup message", module params, etc).

Signed-off-by: Mike Snitzer <[email protected]>
Signed-off-by: Ken Raeburn <[email protected]>
Signed-off-by: Matthew Sakai <[email protected]>

show more ...

dm vdo: move indexer files into sub-directory

The goal is to assist high-level understanding of which code is
conceptually specific to VDO's indexer.

Signed-off-by: Mike Snitzer <[email protected]

dm vdo: move indexer files into sub-directory

The goal is to assist high-level understanding of which code is
conceptually specific to VDO's indexer.

Signed-off-by: Mike Snitzer <[email protected]>
Signed-off-by: Matthew Sakai <[email protected]>

show more ...

dm vdo: fold thread-cond-var.c into thread-utils

Further cleanup is needed for thread-utils interfaces given many
functions should return void or be removed entirely because they
amount to obfuscati

dm vdo: fold thread-cond-var.c into thread-utils

Further cleanup is needed for thread-utils interfaces given many
functions should return void or be removed entirely because they
amount to obfuscation via wrappers.

Signed-off-by: Mike Snitzer <[email protected]>
Signed-off-by: Matthew Sakai <[email protected]>

show more ...

dm vdo: rename uds-threads.[ch] to thread-utils.[ch]

Signed-off-by: Mike Snitzer <[email protected]>
Signed-off-by: Matthew Sakai <[email protected]>

dm vdo: fix sparse warnings about missing statics

Addresses various sparse warnings like:
warning: symbol 'SYMBOL' was not declared. Should it be static?

Signed-off-by: Mike Snitzer <snitzer@kernel

dm vdo: fix sparse warnings about missing statics

Addresses various sparse warnings like:
warning: symbol 'SYMBOL' was not declared. Should it be static?

Signed-off-by: Mike Snitzer <[email protected]>
Signed-off-by: Susan LeGendre-McGhee <[email protected]>
Signed-off-by: Matthew Sakai <[email protected]>

show more ...

dm vdo: use a proper Makefile for dm-vdo

Requires moving dm-vdo-target.c into drivers/md/dm-vdo/

This change adds a proper drivers/md/dm-vdo/Makefile and eliminates
the abnormal use of patsubst in

dm vdo: use a proper Makefile for dm-vdo

Requires moving dm-vdo-target.c into drivers/md/dm-vdo/

This change adds a proper drivers/md/dm-vdo/Makefile and eliminates
the abnormal use of patsubst in drivers/md/Makefile -- which was the
cause of at least one build failure that was reported by the upstream
build bot.

Also, split out VDO's drivers/md/dm-vdo/Kconfig and include it from
drivers/md/Kconfig

Signed-off-by: Mike Snitzer <[email protected]>
Signed-off-by: Matthew Sakai <[email protected]>

show more ...