From fd1096e351b7cfb0a7eb8bee7eceff52e7c7c499 Mon Sep 17 00:00:00 2001 From: Jonas Gorski Date: Thu, 8 Jun 2017 10:40:50 +0200 Subject: [PATCH] kernel: make regmap LZO cache optional There are no users, so hide it and let future users select it. Saves about ~17 kB on MIPS. Signed-off-by: Jonas Gorski --- .../087-regmap-make-LZO-cache-optional.patch | 67 ++++++++++++++++++ .../patches-3.18/259-regmap_dynamic.patch | 19 +++-- .../087-regmap-make-LZO-cache-optional.patch | 69 +++++++++++++++++++ .../patches-4.4/259-regmap_dynamic.patch | 19 ++--- .../087-regmap-make-LZO-cache-optional.patch | 69 +++++++++++++++++++ .../patches-4.9/259-regmap_dynamic.patch | 19 ++--- 6 files changed, 240 insertions(+), 22 deletions(-) create mode 100644 target/linux/generic/patches-3.18/087-regmap-make-LZO-cache-optional.patch create mode 100644 target/linux/generic/patches-4.4/087-regmap-make-LZO-cache-optional.patch create mode 100644 target/linux/generic/patches-4.9/087-regmap-make-LZO-cache-optional.patch diff --git a/target/linux/generic/patches-3.18/087-regmap-make-LZO-cache-optional.patch b/target/linux/generic/patches-3.18/087-regmap-make-LZO-cache-optional.patch new file mode 100644 index 0000000000..94b61fdab4 --- /dev/null +++ b/target/linux/generic/patches-3.18/087-regmap-make-LZO-cache-optional.patch @@ -0,0 +1,67 @@ +From de88e9b0354c2e3ff8eae3f97afe43a34f5ed239 Mon Sep 17 00:00:00 2001 +From: Jonas Gorski +Date: Sat, 13 May 2017 13:03:21 +0200 +Subject: [PATCH] regmap: make LZO cache optional + +Commit 2cbbb579bcbe3 ("regmap: Add the LZO cache support") added support +for LZO compression in regcache, but there were never any users added +afterwards. Since LZO support itself has its own size, it currently is +rather a deoptimization. + +So make it optional by introducing a symbol that can be selected by +drivers wanting to make use of it. + +Saves e.g. ~46 kB on MIPS (size of LZO support + regcache LZO code). + +Signed-off-by: Jonas Gorski +--- +I tried using google to find any users (even out-of-tree ones), but at +best I found a single driver submission that was switched to RBTREE in +subsequent resubmissions (MFD_SMSC). + +One could maybe also just drop the code because of no users for 5 years, +but that would be up to the maintainer(s) to decide. + + drivers/base/regmap/Kconfig | 5 ++++- + drivers/base/regmap/Makefile | 3 ++- + drivers/base/regmap/regcache.c | 2 ++ + 3 files changed, 8 insertions(+), 2 deletions(-) + +--- a/drivers/base/regmap/Kconfig ++++ b/drivers/base/regmap/Kconfig +@@ -4,9 +4,12 @@ + + config REGMAP + default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_MMIO || REGMAP_IRQ) ++ select IRQ_DOMAIN if REGMAP_IRQ ++ bool ++ ++config REGCACHE_COMPRESSED + select LZO_COMPRESS + select LZO_DECOMPRESS +- select IRQ_DOMAIN if REGMAP_IRQ + bool + + config REGMAP_I2C +--- a/drivers/base/regmap/Makefile ++++ b/drivers/base/regmap/Makefile +@@ -1,5 +1,6 @@ + obj-$(CONFIG_REGMAP) += regmap.o regcache.o +-obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-lzo.o regcache-flat.o ++obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-flat.o ++obj-$(CONFIG_REGCACHE_COMPRESSED) += regcache-lzo.o + obj-$(CONFIG_DEBUG_FS) += regmap-debugfs.o + obj-$(CONFIG_REGMAP_I2C) += regmap-i2c.o + obj-$(CONFIG_REGMAP_SPI) += regmap-spi.o +--- a/drivers/base/regmap/regcache.c ++++ b/drivers/base/regmap/regcache.c +@@ -21,7 +21,9 @@ + + static const struct regcache_ops *cache_types[] = { + ®cache_rbtree_ops, ++#if IS_ENABLED(CONFIG_REGCACHE_COMPRESSED) + ®cache_lzo_ops, ++#endif + ®cache_flat_ops, + }; + diff --git a/target/linux/generic/patches-3.18/259-regmap_dynamic.patch b/target/linux/generic/patches-3.18/259-regmap_dynamic.patch index b1d4ad2772..5e422ebd48 100644 --- a/target/linux/generic/patches-3.18/259-regmap_dynamic.patch +++ b/target/linux/generic/patches-3.18/259-regmap_dynamic.patch @@ -1,16 +1,19 @@ --- a/drivers/base/regmap/Kconfig +++ b/drivers/base/regmap/Kconfig -@@ -3,26 +3,31 @@ +@@ -3,9 +3,8 @@ # subsystems should select the appropriate symbols. config REGMAP - default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_MMIO || REGMAP_IRQ) - select LZO_COMPRESS - select LZO_DECOMPRESS select IRQ_DOMAIN if REGMAP_IRQ - bool + tristate "Regmap" + config REGCACHE_COMPRESSED + select LZO_COMPRESS +@@ -13,19 +12,25 @@ config REGCACHE_COMPRESSED + bool + config REGMAP_I2C - tristate + tristate "Regmap I2C" @@ -50,14 +53,18 @@ /* Unspecified -> 0 -> Backwards compatible default */ --- a/drivers/base/regmap/Makefile +++ b/drivers/base/regmap/Makefile -@@ -1,6 +1,8 @@ +@@ -1,7 +1,11 @@ -obj-$(CONFIG_REGMAP) += regmap.o regcache.o --obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-lzo.o regcache-flat.o +-obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-flat.o +-obj-$(CONFIG_REGCACHE_COMPRESSED) += regcache-lzo.o -obj-$(CONFIG_DEBUG_FS) += regmap-debugfs.o -+regmap-core-objs = regmap.o regcache.o regcache-rbtree.o regcache-lzo.o regcache-flat.o ++regmap-core-objs = regmap.o regcache.o regcache-rbtree.o regcache-flat.o +ifdef CONFIG_DEBUG_FS +regmap-core-objs += regmap-debugfs.o +endif ++ifdef CONFIG_REGCACHE_COMPRESSED ++regmap-core-objs += regcache-lzo.o ++endif +obj-$(CONFIG_REGMAP) += regmap-core.o obj-$(CONFIG_REGMAP_I2C) += regmap-i2c.o obj-$(CONFIG_REGMAP_SPI) += regmap-spi.o diff --git a/target/linux/generic/patches-4.4/087-regmap-make-LZO-cache-optional.patch b/target/linux/generic/patches-4.4/087-regmap-make-LZO-cache-optional.patch new file mode 100644 index 0000000000..c26994ee35 --- /dev/null +++ b/target/linux/generic/patches-4.4/087-regmap-make-LZO-cache-optional.patch @@ -0,0 +1,69 @@ +From de88e9b0354c2e3ff8eae3f97afe43a34f5ed239 Mon Sep 17 00:00:00 2001 +From: Jonas Gorski +Date: Sat, 13 May 2017 13:03:21 +0200 +Subject: [PATCH] regmap: make LZO cache optional + +Commit 2cbbb579bcbe3 ("regmap: Add the LZO cache support") added support +for LZO compression in regcache, but there were never any users added +afterwards. Since LZO support itself has its own size, it currently is +rather a deoptimization. + +So make it optional by introducing a symbol that can be selected by +drivers wanting to make use of it. + +Saves e.g. ~46 kB on MIPS (size of LZO support + regcache LZO code). + +Signed-off-by: Jonas Gorski +--- +I tried using google to find any users (even out-of-tree ones), but at +best I found a single driver submission that was switched to RBTREE in +subsequent resubmissions (MFD_SMSC). + +One could maybe also just drop the code because of no users for 5 years, +but that would be up to the maintainer(s) to decide. + + drivers/base/regmap/Kconfig | 5 ++++- + drivers/base/regmap/Makefile | 3 ++- + drivers/base/regmap/regcache.c | 2 ++ + 3 files changed, 8 insertions(+), 2 deletions(-) + +--- a/drivers/base/regmap/Kconfig ++++ b/drivers/base/regmap/Kconfig +@@ -4,9 +4,12 @@ + + config REGMAP + default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ) ++ select IRQ_DOMAIN if REGMAP_IRQ ++ bool ++ ++config REGCACHE_COMPRESSED + select LZO_COMPRESS + select LZO_DECOMPRESS +- select IRQ_DOMAIN if REGMAP_IRQ + bool + + config REGMAP_AC97 +--- a/drivers/base/regmap/Makefile ++++ b/drivers/base/regmap/Makefile +@@ -2,7 +2,8 @@ + CFLAGS_regmap.o := -I$(src) + + obj-$(CONFIG_REGMAP) += regmap.o regcache.o +-obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-lzo.o regcache-flat.o ++obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-flat.o ++obj-$(CONFIG_REGCACHE_COMPRESSED) += regcache-lzo.o + obj-$(CONFIG_DEBUG_FS) += regmap-debugfs.o + obj-$(CONFIG_REGMAP_AC97) += regmap-ac97.o + obj-$(CONFIG_REGMAP_I2C) += regmap-i2c.o +--- a/drivers/base/regmap/regcache.c ++++ b/drivers/base/regmap/regcache.c +@@ -21,7 +21,9 @@ + + static const struct regcache_ops *cache_types[] = { + ®cache_rbtree_ops, ++#if IS_ENABLED(CONFIG_REGCACHE_COMPRESSED) + ®cache_lzo_ops, ++#endif + ®cache_flat_ops, + }; + diff --git a/target/linux/generic/patches-4.4/259-regmap_dynamic.patch b/target/linux/generic/patches-4.4/259-regmap_dynamic.patch index fb039841c1..42a9728567 100644 --- a/target/linux/generic/patches-4.4/259-regmap_dynamic.patch +++ b/target/linux/generic/patches-4.4/259-regmap_dynamic.patch @@ -1,18 +1,17 @@ --- a/drivers/base/regmap/Kconfig +++ b/drivers/base/regmap/Kconfig -@@ -3,29 +3,35 @@ +@@ -3,9 +3,8 @@ # subsystems should select the appropriate symbols. config REGMAP - default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ) - select LZO_COMPRESS - select LZO_DECOMPRESS select IRQ_DOMAIN if REGMAP_IRQ - bool + tristate "Regmap" - config REGMAP_AC97 -+ select REGMAP + config REGCACHE_COMPRESSED + select LZO_COMPRESS +@@ -16,19 +15,25 @@ config REGMAP_AC97 tristate config REGMAP_I2C @@ -54,17 +53,21 @@ /* Unspecified -> 0 -> Backwards compatible default */ --- a/drivers/base/regmap/Makefile +++ b/drivers/base/regmap/Makefile -@@ -1,9 +1,11 @@ +@@ -1,10 +1,14 @@ # For include/trace/define_trace.h to include trace.h CFLAGS_regmap.o := -I$(src) -obj-$(CONFIG_REGMAP) += regmap.o regcache.o --obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-lzo.o regcache-flat.o +-obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-flat.o +-obj-$(CONFIG_REGCACHE_COMPRESSED) += regcache-lzo.o -obj-$(CONFIG_DEBUG_FS) += regmap-debugfs.o -+regmap-core-objs = regmap.o regcache.o regcache-rbtree.o regcache-lzo.o regcache-flat.o ++regmap-core-objs = regmap.o regcache.o regcache-rbtree.o regcache-flat.o +ifdef CONFIG_DEBUG_FS +regmap-core-objs += regmap-debugfs.o +endif ++ifdef CONFIG_REGCACHE_COMPRESSED ++regmap-core-objs += regcache-lzo.o ++endif +obj-$(CONFIG_REGMAP) += regmap-core.o obj-$(CONFIG_REGMAP_AC97) += regmap-ac97.o obj-$(CONFIG_REGMAP_I2C) += regmap-i2c.o diff --git a/target/linux/generic/patches-4.9/087-regmap-make-LZO-cache-optional.patch b/target/linux/generic/patches-4.9/087-regmap-make-LZO-cache-optional.patch new file mode 100644 index 0000000000..c26994ee35 --- /dev/null +++ b/target/linux/generic/patches-4.9/087-regmap-make-LZO-cache-optional.patch @@ -0,0 +1,69 @@ +From de88e9b0354c2e3ff8eae3f97afe43a34f5ed239 Mon Sep 17 00:00:00 2001 +From: Jonas Gorski +Date: Sat, 13 May 2017 13:03:21 +0200 +Subject: [PATCH] regmap: make LZO cache optional + +Commit 2cbbb579bcbe3 ("regmap: Add the LZO cache support") added support +for LZO compression in regcache, but there were never any users added +afterwards. Since LZO support itself has its own size, it currently is +rather a deoptimization. + +So make it optional by introducing a symbol that can be selected by +drivers wanting to make use of it. + +Saves e.g. ~46 kB on MIPS (size of LZO support + regcache LZO code). + +Signed-off-by: Jonas Gorski +--- +I tried using google to find any users (even out-of-tree ones), but at +best I found a single driver submission that was switched to RBTREE in +subsequent resubmissions (MFD_SMSC). + +One could maybe also just drop the code because of no users for 5 years, +but that would be up to the maintainer(s) to decide. + + drivers/base/regmap/Kconfig | 5 ++++- + drivers/base/regmap/Makefile | 3 ++- + drivers/base/regmap/regcache.c | 2 ++ + 3 files changed, 8 insertions(+), 2 deletions(-) + +--- a/drivers/base/regmap/Kconfig ++++ b/drivers/base/regmap/Kconfig +@@ -4,9 +4,12 @@ + + config REGMAP + default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ) ++ select IRQ_DOMAIN if REGMAP_IRQ ++ bool ++ ++config REGCACHE_COMPRESSED + select LZO_COMPRESS + select LZO_DECOMPRESS +- select IRQ_DOMAIN if REGMAP_IRQ + bool + + config REGMAP_AC97 +--- a/drivers/base/regmap/Makefile ++++ b/drivers/base/regmap/Makefile +@@ -2,7 +2,8 @@ + CFLAGS_regmap.o := -I$(src) + + obj-$(CONFIG_REGMAP) += regmap.o regcache.o +-obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-lzo.o regcache-flat.o ++obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-flat.o ++obj-$(CONFIG_REGCACHE_COMPRESSED) += regcache-lzo.o + obj-$(CONFIG_DEBUG_FS) += regmap-debugfs.o + obj-$(CONFIG_REGMAP_AC97) += regmap-ac97.o + obj-$(CONFIG_REGMAP_I2C) += regmap-i2c.o +--- a/drivers/base/regmap/regcache.c ++++ b/drivers/base/regmap/regcache.c +@@ -21,7 +21,9 @@ + + static const struct regcache_ops *cache_types[] = { + ®cache_rbtree_ops, ++#if IS_ENABLED(CONFIG_REGCACHE_COMPRESSED) + ®cache_lzo_ops, ++#endif + ®cache_flat_ops, + }; + diff --git a/target/linux/generic/patches-4.9/259-regmap_dynamic.patch b/target/linux/generic/patches-4.9/259-regmap_dynamic.patch index 48aa8083d9..8cc2361c0b 100644 --- a/target/linux/generic/patches-4.9/259-regmap_dynamic.patch +++ b/target/linux/generic/patches-4.9/259-regmap_dynamic.patch @@ -1,18 +1,17 @@ --- a/drivers/base/regmap/Kconfig +++ b/drivers/base/regmap/Kconfig -@@ -3,29 +3,35 @@ +@@ -3,9 +3,8 @@ # subsystems should select the appropriate symbols. config REGMAP - default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ) - select LZO_COMPRESS - select LZO_DECOMPRESS select IRQ_DOMAIN if REGMAP_IRQ - bool + tristate "Regmap" - config REGMAP_AC97 -+ select REGMAP + config REGCACHE_COMPRESSED + select LZO_COMPRESS +@@ -16,19 +15,25 @@ config REGMAP_AC97 tristate config REGMAP_I2C @@ -54,17 +53,21 @@ /* Unspecified -> 0 -> Backwards compatible default */ --- a/drivers/base/regmap/Makefile +++ b/drivers/base/regmap/Makefile -@@ -1,9 +1,11 @@ +@@ -1,10 +1,14 @@ # For include/trace/define_trace.h to include trace.h CFLAGS_regmap.o := -I$(src) -obj-$(CONFIG_REGMAP) += regmap.o regcache.o --obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-lzo.o regcache-flat.o +-obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-flat.o +-obj-$(CONFIG_REGCACHE_COMPRESSED) += regcache-lzo.o -obj-$(CONFIG_DEBUG_FS) += regmap-debugfs.o -+regmap-core-objs = regmap.o regcache.o regcache-rbtree.o regcache-lzo.o regcache-flat.o ++regmap-core-objs = regmap.o regcache.o regcache-rbtree.o regcache-flat.o +ifdef CONFIG_DEBUG_FS +regmap-core-objs += regmap-debugfs.o +endif ++ifdef CONFIG_REGCACHE_COMPRESSED ++regmap-core-objs += regcache-lzo.o ++endif +obj-$(CONFIG_REGMAP) += regmap-core.o obj-$(CONFIG_REGMAP_AC97) += regmap-ac97.o obj-$(CONFIG_REGMAP_I2C) += regmap-i2c.o -- 2.30.2