Skip to content

Commit

Permalink
---
Browse files Browse the repository at this point in the history
yaml
---
r: 78010
b: refs/heads/master
c: e414004
h: refs/heads/master
v: v3
  • Loading branch information
Ralf Baechle committed Jan 29, 2008
1 parent a8093fe commit 45fc834
Show file tree
Hide file tree
Showing 163 changed files with 2,005 additions and 9,608 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 5ea293a9048d3a58cb0c840fa719d85ad14cba47
refs/heads/master: e414004e94b5aebf57ca11be009fed5e39f5b6a8
1 change: 0 additions & 1 deletion trunk/.gitignore
Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,6 @@
*.i
*.lst
*.symtypes
*.order

#
# Top-level generic files
Expand Down
20 changes: 1 addition & 19 deletions trunk/Documentation/filesystems/ext4.txt
Original file line number Diff line number Diff line change
Expand Up @@ -86,21 +86,9 @@ Alex is working on a new set of patches right now.
When mounting an ext4 filesystem, the following option are accepted:
(*) == default

extents (*) ext4 will use extents to address file data. The
extents ext4 will use extents to address file data. The
file system will no longer be mountable by ext3.

noextents ext4 will not use extents for newly created files

journal_checksum Enable checksumming of the journal transactions.
This will allow the recovery code in e2fsck and the
kernel to detect corruption in the kernel. It is a
compatible change and will be ignored by older kernels.

journal_async_commit Commit block can be written to disk without waiting
for descriptor blocks. If enabled older kernels cannot
mount the device. This will enable 'journal_checksum'
internally.

journal=update Update the ext4 file system's journal to the current
format.

Expand Down Expand Up @@ -208,12 +196,6 @@ nobh (a) cache disk block mapping information
"nobh" option tries to avoid associating buffer
heads (supported only for "writeback" mode).

mballoc (*) Use the multiple block allocator for block allocation
nomballoc disabled multiple block allocator for block allocation.
stripe=n Number of filesystem blocks that mballoc will try
to use for allocation size and alignment. For RAID5/6
systems this should be the number of data
disks * RAID chunk size in file system blocks.

Data Mode
---------
Expand Down
39 changes: 0 additions & 39 deletions trunk/Documentation/filesystems/proc.txt
Original file line number Diff line number Diff line change
Expand Up @@ -857,45 +857,6 @@ CPUs.
The "procs_blocked" line gives the number of processes currently blocked,
waiting for I/O to complete.

1.9 Ext4 file system parameters
------------------------------
Ext4 file system have one directory per partition under /proc/fs/ext4/
# ls /proc/fs/ext4/hdc/
group_prealloc max_to_scan mb_groups mb_history min_to_scan order2_req
stats stream_req

mb_groups:
This file gives the details of mutiblock allocator buddy cache of free blocks

mb_history:
Multiblock allocation history.

stats:
This file indicate whether the multiblock allocator should start collecting
statistics. The statistics are shown during unmount

group_prealloc:
The multiblock allocator normalize the block allocation request to
group_prealloc filesystem blocks if we don't have strip value set.
The stripe value can be specified at mount time or during mke2fs.

max_to_scan:
How long multiblock allocator can look for a best extent (in found extents)

min_to_scan:
How long multiblock allocator must look for a best extent

order2_req:
Multiblock allocator use 2^N search using buddies only for requests greater
than or equal to order2_req. The request size is specfied in file system
blocks. A value of 2 indicate only if the requests are greater than or equal
to 4 blocks.

stream_req:
Files smaller than stream_req are served by the stream allocator, whose
purpose is to pack requests as close each to other as possible to
produce smooth I/O traffic. Avalue of 16 indicate that file smaller than 16
filesystem block size will use group based preallocation.

------------------------------------------------------------------------------
Summary
Expand Down
111 changes: 6 additions & 105 deletions trunk/Documentation/kbuild/kconfig-language.txt
Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,7 @@ visible if its parent entry is also visible.
Menu entries
------------

Most entries define a config option; all other entries help to organize
Most entries define a config option, all other entries help to organize
them. A single configuration option is defined like this:

config MODVERSIONS
Expand All @@ -50,7 +50,7 @@ applicable everywhere (see syntax).

- type definition: "bool"/"tristate"/"string"/"hex"/"int"
Every config option must have a type. There are only two basic types:
tristate and string; the other types are based on these two. The type
tristate and string, the other types are based on these two. The type
definition optionally accepts an input prompt, so these two examples
are equivalent:

Expand Down Expand Up @@ -108,7 +108,7 @@ applicable everywhere (see syntax).
equal to 'y' without visiting the dependencies. So abusing
select you are able to select a symbol FOO even if FOO depends
on BAR that is not set. In general use select only for
non-visible symbols (no prompts anywhere) and for symbols with
non-visible symbols (no promts anywhere) and for symbols with
no dependencies. That will limit the usefulness but on the
other hand avoid the illegal configurations all over. kconfig
should one day warn about such things.
Expand All @@ -127,27 +127,6 @@ applicable everywhere (see syntax).
used to help visually separate configuration logic from help within
the file as an aid to developers.

- misc options: "option" <symbol>[=<value>]
Various less common options can be defined via this option syntax,
which can modify the behaviour of the menu entry and its config
symbol. These options are currently possible:

- "defconfig_list"
This declares a list of default entries which can be used when
looking for the default configuration (which is used when the main
.config doesn't exists yet.)

- "modules"
This declares the symbol to be used as the MODULES symbol, which
enables the third modular state for all config symbols.

- "env"=<value>
This imports the environment variable into Kconfig. It behaves like
a default, except that the value comes from the environment, this
also means that the behaviour when mixing it with normal defaults is
undefined at this point. The symbol is currently not exported back
to the build environment (if this is desired, it can be done via
another symbol).

Menu dependencies
-----------------
Expand Down Expand Up @@ -183,9 +162,9 @@ An expression can have a value of 'n', 'm' or 'y' (or 0, 1, 2
respectively for calculations). A menu entry becomes visible when it's
expression evaluates to 'm' or 'y'.

There are two types of symbols: constant and non-constant symbols.
Non-constant symbols are the most common ones and are defined with the
'config' statement. Non-constant symbols consist entirely of alphanumeric
There are two types of symbols: constant and nonconstant symbols.
Nonconstant symbols are the most common ones and are defined with the
'config' statement. Nonconstant symbols consist entirely of alphanumeric
characters or underscores.
Constant symbols are only part of expressions. Constant symbols are
always surrounded by single or double quotes. Within the quote, any
Expand Down Expand Up @@ -322,81 +301,3 @@ mainmenu:

This sets the config program's title bar if the config program chooses
to use it.


Kconfig hints
-------------
This is a collection of Kconfig tips, most of which aren't obvious at
first glance and most of which have become idioms in several Kconfig
files.

Adding common features and make the usage configurable
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
It is a common idiom to implement a feature/functionality that are
relevant for some architectures but not all.
The recommended way to do so is to use a config variable named HAVE_*
that is defined in a common Kconfig file and selected by the relevant
architectures.
An example is the generic IOMAP functionality.

We would in lib/Kconfig see:

# Generic IOMAP is used to ...
config HAVE_GENERIC_IOMAP

config GENERIC_IOMAP
depends on HAVE_GENERIC_IOMAP && FOO

And in lib/Makefile we would see:
obj-$(CONFIG_GENERIC_IOMAP) += iomap.o

For each architecture using the generic IOMAP functionality we would see:

config X86
select ...
select HAVE_GENERIC_IOMAP
select ...

Note: we use the existing config option and avoid creating a new
config variable to select HAVE_GENERIC_IOMAP.

Note: the use of the internal config variable HAVE_GENERIC_IOMAP, it is
introduced to overcome the limitation of select which will force a
config option to 'y' no matter the dependencies.
The dependencies are moved to the symbol GENERIC_IOMAP and we avoid the
situation where select forces a symbol equals to 'y'.

Build as module only
~~~~~~~~~~~~~~~~~~~~
To restrict a component build to module-only, qualify its config symbol
with "depends on m". E.g.:

config FOO
depends on BAR && m

limits FOO to module (=m) or disabled (=n).


Build limited by a third config symbol which may be =y or =m
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A common idiom that we see (and sometimes have problems with) is this:

When option C in B (module or subsystem) uses interfaces from A (module
or subsystem), and both A and B are tristate (could be =y or =m if they
were independent of each other, but they aren't), then we need to limit
C such that it cannot be built statically if A is built as a loadable
module. (C already depends on B, so there is no dependency issue to
take care of here.)

If A is linked statically into the kernel image, C can be built
statically or as loadable module(s). However, if A is built as loadable
module(s), then C must be restricted to loadable module(s) also. This
can be expressed in kconfig language as:

config C
depends on A = y || A = B

or for real examples, use this command in a kernel tree:

$ find . -name Kconfig\* | xargs grep -ns "depends on.*=.*||.*=" | grep -v orig

28 changes: 6 additions & 22 deletions trunk/Makefile
Original file line number Diff line number Diff line change
Expand Up @@ -520,11 +520,6 @@ KBUILD_CFLAGS += -g
KBUILD_AFLAGS += -gdwarf-2
endif

# We trigger additional mismatches with less inlining
ifdef CONFIG_DEBUG_SECTION_MISMATCH
KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
endif

# Force gcc to behave correct even for buggy distributions
KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)

Expand Down Expand Up @@ -798,7 +793,7 @@ define rule_vmlinux-modpost
endef

# vmlinux image - including updated kernel symbols
vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE
ifdef CONFIG_HEADERS_CHECK
$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
endif
Expand All @@ -809,9 +804,7 @@ endif
$(call if_changed_rule,vmlinux__)
$(Q)rm -f .old_version

# build vmlinux.o first to catch section mismatch errors early
$(kallsyms.o): vmlinux.o
vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE
vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
$(call if_changed_rule,vmlinux-modpost)

# The actual objects are generated when descending,
Expand Down Expand Up @@ -1028,14 +1021,9 @@ ifdef CONFIG_MODULES
all: modules

# Build modules
#
# A module can be listed more than once in obj-m resulting in
# duplicate lines in modules.order files. Those are removed
# using awk while concatenating to the final file.

PHONY += modules
modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
$(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
@echo ' Building modules, stage 2.';
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost

Expand Down Expand Up @@ -1063,7 +1051,6 @@ _modinst_:
rm -f $(MODLIB)/build ; \
ln -s $(objtree) $(MODLIB)/build ; \
fi
@cp -f $(objtree)/modules.order $(MODLIB)/
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst

# This depmod is only for convenience to give the initial
Expand Down Expand Up @@ -1123,7 +1110,7 @@ clean: archclean $(clean-dirs)
@find . $(RCS_FIND_IGNORE) \
\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
-o -name '*.symtypes' -o -name 'modules.order' \) \
-o -name '*.symtypes' \) \
-type f -print | xargs rm -f

# mrproper - Delete all generated files, including .config
Expand Down Expand Up @@ -1188,7 +1175,7 @@ help:
@echo ' dir/ - Build all files in dir and below'
@echo ' dir/file.[ois] - Build specified target only'
@echo ' dir/file.ko - Build module including final link'
@echo ' prepare - Set up for building external modules'
@echo ' rpm - Build a kernel as an RPM package'
@echo ' tags/TAGS - Generate tags file for editors'
@echo ' cscope - Generate cscope index'
@echo ' kernelrelease - Output the release version string'
Expand All @@ -1201,8 +1188,6 @@ help:
@echo 'Static analysers'
@echo ' checkstack - Generate a list of stack hogs'
@echo ' namespacecheck - Name space analysis on compiled kernel'
@echo ' versioncheck - Sanity check on version.h usage'
@echo ' includecheck - Check for duplicate included header files'
@echo ' export_report - List the usages of all exported symbols'
@if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
echo ' headers_check - Sanity check on exported headers'; \
Expand Down Expand Up @@ -1386,7 +1371,6 @@ define xtags
if $1 --version 2>&1 | grep -iq exuberant; then \
$(all-sources) | xargs $1 -a \
-I __initdata,__exitdata,__acquires,__releases \
-I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
-I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
--extra=+f --c-kinds=+px \
--regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
Expand Down Expand Up @@ -1444,12 +1428,12 @@ tags: FORCE
includecheck:
find * $(RCS_FIND_IGNORE) \
-name '*.[hcS]' -type f -print | sort \
| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
| xargs $(PERL) -w scripts/checkincludes.pl

versioncheck:
find * $(RCS_FIND_IGNORE) \
-name '*.[hcS]' -type f -print | sort \
| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
| xargs $(PERL) -w scripts/checkversion.pl

namespacecheck:
$(PERL) $(srctree)/scripts/namespace.pl
Expand Down
8 changes: 4 additions & 4 deletions trunk/arch/alpha/kernel/vmlinux.lds.S
Original file line number Diff line number Diff line change
Expand Up @@ -46,11 +46,11 @@ SECTIONS
__init_begin = .;
.init.text : {
_sinittext = .;
INIT_TEXT
*(.init.text)
_einittext = .;
}
.init.data : {
INIT_DATA
*(.init.data)
}

. = ALIGN(16);
Expand Down Expand Up @@ -136,8 +136,8 @@ SECTIONS

/* Sections to be discarded */
/DISCARD/ : {
EXIT_TEXT
EXIT_DATA
*(.exit.text)
*(.exit.data)
*(.exitcall.exit)
}

Expand Down
3 changes: 2 additions & 1 deletion trunk/arch/alpha/lib/dec_and_lock.c
Original file line number Diff line number Diff line change
Expand Up @@ -30,7 +30,8 @@ _atomic_dec_and_lock: \n\
.previous \n\
.end _atomic_dec_and_lock");

static int __used atomic_dec_and_lock_1(atomic_t *atomic, spinlock_t *lock)
static int __attribute_used__
atomic_dec_and_lock_1(atomic_t *atomic, spinlock_t *lock)
{
/* Slow path */
spin_lock(lock);
Expand Down
Loading

0 comments on commit 45fc834

Please sign in to comment.