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Date: Thu, 6 Nov 2014 13:59:07 -0800 From: josh@...htriplett.org To: Aristeu Rozanski <aris@...hat.com> Cc: linux-kernel@...r.kernel.org, Aristeu Rozanski <arozansk@...hat.com>, Jan Kara <jack@...e.cz>, Andrew Morton <akpm@...ux-foundation.org>, Andreas Dilger <adilger.kernel@...ger.ca>, Paul Gortmaker <paul.gortmaker@...driver.com> Subject: Re: [PATCH] lib/halfmd4: make build optional On Thu, Nov 06, 2014 at 04:27:33PM -0500, Aristeu Rozanski wrote: > From: Aristeu Rozanski <arozansk@...hat.com> > > halfmd4 currently is built unconditionally: > text data bss dec hex filename > 801 176 8 985 3d9 lib/halfmd4.o > 801 176 8 985 3d9 (TOTALS) > > and it's used by ext3 and ext4. This patch is useful for situations > in which memory footprint is a concern and those filesystems aren't > used. > > Cc: Jan Kara <jack@...e.cz> > Cc: Andrew Morton <akpm@...ux-foundation.org> > Cc: Andreas Dilger <adilger.kernel@...ger.ca> > Cc: Paul Gortmaker <paul.gortmaker@...driver.com> > Cc: Josh Triplett <josh@...htriplett.org> > Signed-off-by: Aristeu Rozanski <arozansk@...hat.com> I already have a patch for this in the tiny tree, branch tiny/no-halfmd4, and it uses an internal hidden Kconfig symbol. - Josh Triplett > fs/ext3/Kconfig | 1 + > fs/ext4/Kconfig | 1 + > lib/Kconfig | 7 +++++++ > lib/Makefile | 3 ++- > 4 files changed, 11 insertions(+), 1 deletion(-) > > diff --git a/fs/ext3/Kconfig b/fs/ext3/Kconfig > index e8c6ba0..a6ab4e8 100644 > --- a/fs/ext3/Kconfig > +++ b/fs/ext3/Kconfig > @@ -1,6 +1,7 @@ > config EXT3_FS > tristate "Ext3 journalling file system support" > select JBD > + select HALF_MD4 > help > This is the journalling version of the Second extended file system > (often called ext3), the de facto standard Linux file system > diff --git a/fs/ext4/Kconfig b/fs/ext4/Kconfig > index efea5d5..cbb56ee 100644 > --- a/fs/ext4/Kconfig > +++ b/fs/ext4/Kconfig > @@ -4,6 +4,7 @@ config EXT4_FS > select CRC16 > select CRYPTO > select CRYPTO_CRC32C > + select HALF_MD4 > help > This is the next generation of the ext3 filesystem. > > diff --git a/lib/Kconfig b/lib/Kconfig > index 675920b..108196c 100644 > --- a/lib/Kconfig > +++ b/lib/Kconfig > @@ -180,6 +180,13 @@ config CRC8 > when they need to do cyclic redundancy check according CRC8 > algorithm. Module will be called crc8. > > +config HALF_MD4 > + bool "Half MD4 transform" > + default y > + help > + This option enables a reduced (32 bit output) version of MD4 > + transform. > + > config AUDIT_GENERIC > bool > depends on AUDIT && !AUDIT_ARCH > diff --git a/lib/Makefile b/lib/Makefile > index 9c12cbc..53fd120 100644 > --- a/lib/Makefile > +++ b/lib/Makefile > @@ -22,7 +22,7 @@ lib-$(CONFIG_SMP) += cpumask.o > lib-y += kobject.o klist.o > obj-y += lockref.o > > -obj-y += bcd.o div64.o sort.o parser.o halfmd4.o debug_locks.o random32.o \ > +obj-y += bcd.o div64.o sort.o parser.o debug_locks.o random32.o \ > bust_spinlocks.o hexdump.o kasprintf.o bitmap.o scatterlist.o \ > gcd.o lcm.o list_sort.o uuid.o iovec.o clz_ctz.o \ > bsearch.o find_last_bit.o find_next_bit.o llist.o memweight.o kfifo.o \ > @@ -74,6 +74,7 @@ obj-$(CONFIG_CRC7) += crc7.o > obj-$(CONFIG_LIBCRC32C) += libcrc32c.o > obj-$(CONFIG_CRC8) += crc8.o > obj-$(CONFIG_GENERIC_ALLOCATOR) += genalloc.o > +obj-$(CONFIG_HALF_MD4) += halfmd4.o > > obj-$(CONFIG_ZLIB_INFLATE) += zlib_inflate/ > obj-$(CONFIG_ZLIB_DEFLATE) += zlib_deflate/ > -- > 1.8.3.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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