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kernel: make regmap LZO cache optional
authorJonas Gorski <jonas.gorski@gmail.com>
Thu, 8 Jun 2017 08:40:50 +0000 (10:40 +0200)
committerJonas Gorski <jonas.gorski@gmail.com>
Sat, 10 Jun 2017 10:40:37 +0000 (12:40 +0200)
There are no users, so hide it and let future users select it. Saves
about ~17 kB on MIPS.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
target/linux/generic/patches-3.18/087-regmap-make-LZO-cache-optional.patch [new file with mode: 0644] patch | blob
target/linux/generic/patches-3.18/259-regmap_dynamic.patch patch | blob | history
target/linux/generic/patches-4.4/087-regmap-make-LZO-cache-optional.patch [new file with mode: 0644] patch | blob
target/linux/generic/patches-4.4/259-regmap_dynamic.patch patch | blob | history
target/linux/generic/patches-4.9/087-regmap-make-LZO-cache-optional.patch [new file with mode: 0644] patch | blob
target/linux/generic/patches-4.9/259-regmap_dynamic.patch patch | blob | history

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 (file)
index 0000000..94b61fd
--- /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 <jonas.gorski@gmail.com>
+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 <jonas.gorski@gmail.com>
+---
+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[] = {
+       &regcache_rbtree_ops,
++#if IS_ENABLED(CONFIG_REGCACHE_COMPRESSED)
+       &regcache_lzo_ops,
++#endif
+       &regcache_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 b1d4ad277274e27fea5125916db3d33f1cd7e55e..5e422ebd48434dd9003b9940593e324b3e214993 100644 (file)
--- 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 (file)
index 0000000..c26994e
--- /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 <jonas.gorski@gmail.com>
+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 <jonas.gorski@gmail.com>
+---
+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[] = {
+       &regcache_rbtree_ops,
++#if IS_ENABLED(CONFIG_REGCACHE_COMPRESSED)
+       &regcache_lzo_ops,
++#endif
+       &regcache_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 fb039841c19a72b4a053d8d600bc782b3c6de866..42a97285675472f11fcd3ad62dbbb0347350162a 100644 (file)
--- 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 (file)
index 0000000..c26994e
--- /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 <jonas.gorski@gmail.com>
+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 <jonas.gorski@gmail.com>
+---
+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[] = {
+       &regcache_rbtree_ops,
++#if IS_ENABLED(CONFIG_REGCACHE_COMPRESSED)
+       &regcache_lzo_ops,
++#endif
+       &regcache_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 48aa8083d91cd44629e40584cc4be0ca9bd0fcf0..8cc2361c0bd88f03e1d56b5662b6a7e46d8eb148 100644 (file)
--- 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
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