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* regulator: Add missing n_voltages setting for max8925Axel Lin2012-04-02
| | | | | | | | | | The n_voltages are the same for all regulators: (max - min / step) + 1 == 64. The vol_shift is always 0, and the vol_nbits is always the same as n_voltages setting. Thus we can remove vol_shitf and vol_nbits fields from struct max8925_regulator_info. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Set list_voltage callback for max8925Axel Lin2012-04-02
| | | | | | | | Current code implements max8925_list_voltage but does not set the list_voltage callback function in max8925_regulator_[ldo|sdv]_ops. Fix it. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Convert 88pm8607 to get_voltage_selAxel Lin2012-04-01
| | | | | | Signed-off-by: Axel Lin <axel.lin@gmail.com> Tested-by: Jett Zhou <jtzhou@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Convert 88pm8607 to set_voltage_selAxel Lin2012-04-01
| | | | | | Signed-off-by: Axel Lin <axel.lin@gmail.com> Tested-by: Jett Zhou <jtzhou@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Add missing n_voltages setting for 88pm8607Axel Lin2012-04-01
| | | | | | | | Then we can remove the vol_nbits field from struct pm8607_regulator_info. Signed-off-by: Axel Lin <axel.lin@gmail.com> Tested-by: Jett Zhou <jtzhou@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Set list_voltage callback for 88pm8607Axel Lin2012-04-01
| | | | | | | | | Current code implements pm8607_list_voltage but does not set the list_voltage callback function in pm8607_regulator_ops. Fix it. Signed-off-by: Axel Lin <axel.lin@gmail.com> Tested-by: Jett Zhou <jtzhou@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Trivial comment fix for wm831x-ldo driverAxel Lin2012-04-01
| | | | | Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Convert tps6524x to get_voltage_selAxel Lin2012-04-01
| | | | | Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Convert tps6524x to set_voltage_selAxel Lin2012-04-01
| | | | | Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: ad5398: Use devm_kzallocAxel Lin2012-04-01
| | | | | | Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: ad5398: show changing current in uAAxel Lin2012-04-01
| | | | | | | | | | | | | | | | | | | | | | Integer division may truncate the result. Current code shows changing current is 0mA when selector is 1 ... 8. For example: selector = 1 ad5398_calc_current returns 117, debug message shows 117/1000 = 0mA selector = 2 ad5398_calc_current returns 234, debug message shows 234/1000 = 0mA selector = 3 ad5398_calc_current returns 351, debug message shows 351/1000 = 0mA ............ selector = 8 ad5398_calc_current returns 937, debug message shows 937/1000 = 0mA Show the changing current in uA makes it easier for debugging. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: tps65023: Remove unused client field from struct tps_pmicAxel Lin2012-04-01
| | | | | | | The client field of struct tps_pmic is not used after converting to regmap API. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Remove unused name and client fields from struct tps62360_chipAxel Lin2012-04-01
| | | | | | | | The client field of struct tps62360_chip is not used after converting to regmap. The name field of struct tps62360_chip is not used in this driver. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Refactor to use one da9052_ldo_ops/da9052_dcdc_ops for all LDOs/DCDCsAxel Lin2012-04-01
| | | | | | | | | | | | | | | | | | In current implementation, da9052_ldo_ops and da9052_ldo5_6_ops are very similar, only the set_voltage is slightly different. da9052_buckperi_ops and da9052_dcdc_ops are also similar. This patch adds da9052_regulator_set_voltage for the set_voltage callback used by all LDOs and DCDCs. Rework da9052_get_regulator_voltage_sel and da9052_set_dcdc_voltage to make it possible to be shared by all DCDCs. Rework da9052_list_voltage to make it to be shared by all DCDCs and LDOs. Then we can remove da9052_ldo5_6_ops and da9052_buckperi_ops. We can also remove DA9052_LDO5_6 and DA9052_BUCKPERI macros which is not used now. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Fix da9052 ldo regulator namesAxel Lin2012-04-01
| | | | | | | | The regulator name for LDOs are LDO4 ... LDO13 in current implementation. The correct regulator name for LDOs should be LDO1 ... LDO10. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Convert tps65023 to set_voltage_selAxel Lin2012-04-01
| | | | | | | | | | | | This patch also changes the define for TPS65023_LDO_CTRL_LDOx_MASK, because regmap_update_bits actually does: (orig & ~mask) | (val & mask) This change makes the code consists for all regmap_update_bits calls. Also removes some uninformative comments. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Add MAX8997_VOLTAGE_REGULATOR and MAX8997_CURRENT_REGULATOR macrosAxel Lin2012-04-01
| | | | | | | | | | | | MAX8997_VOLTAGE_REGULATOR macro has _name and _ops parameters so we can use it for all regulators with REGULATOR_VOLTAGE type. The MAX8997_VOLTAGE_REGULATOR now replaces regulator_desc_ldo and regulator_desc_buck macros. MAX8997_CURRENT_REGULATOR is for CHARGER and CHARGER_TOPOFF. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Make max8997_get_voltage_register always return correct registerAxel Lin2012-04-01
| | | | | | | | Check max8997->buck[1|2|5]_gpiodvs status in max8997_get_voltage_register and return correct register accordingly. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Convert max8952 to set_voltage_selAxel Lin2012-04-01
| | | | | | Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Remove _en_reg, _en_bit and _ops parameters from tps65090_REG macroAxel Lin2012-04-01
| | | | | | | | | | | Both _en_bit and _ops parameters for all DCDCs and FETs are the same, so we can hardcode it in tps65090_REG macro. _en_reg can be calculated by _id + 12, so we can also remove it. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked by: Venu Byravarasu <vbyravarasu@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: tps65090: Use IS_ERR to check return value of regulator_registerAxel Lin2012-04-01
| | | | | | | | regulator_register never returns NULL. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked by: Venu Byravarasu <vbyravarasu@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Merge tps6586x_regulator_ldo_ops and tps6586x_regulator_dvm_opsAxel Lin2012-04-01
| | | | | | | | | | Now all the callback implementation are the same for both ldo and dvm regulator_ops, merge them to tps6586x_regulator_ops. Also rename tps6586x_ldo_list_voltage to tps6586x_list_voltage. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Convert tps6586x to set_voltage_selAxel Lin2012-04-01
| | | | | | | Convert both tps6586x_[ldo|dvm]_set_voltage to one set_voltage_sel callback. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Convert tps6586x to get_voltage_selAxel Lin2012-04-01
| | | | | | | This also fixes a bug, LDO0 has minimal voltage 1.2V rather than 1.25V. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: wm831x-dcdc: Use devm_kzallocAxel Lin2012-04-01
| | | | | Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Convert pcap-regulator to get_voltage_selAxel Lin2012-04-01
| | | | | Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Convert pcap-regulator to set_voltage_selAxel Lin2012-04-01
| | | | | | | | | After converting to set_voltage_sel, we can remove the workaroud of getting the best match voltage for V1. The core will iterate through the whole voltage table and find the best match for us. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Convert lp3972 to set_voltage_selAxel Lin2012-04-01
| | | | | | Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-By: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Convert lp3971 to set_voltage_selAxel Lin2012-04-01
| | | | | | Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-By: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Add TPS65090 regulator driverVenu Byravarasu2012-04-01
| | | | | | | | | | | | Add TPS65090 regulator driver TPS65090 PMIC from TI consists of 3 step down converters, 2 always on LDOs and 7 current limited load switches. The output voltages are ON/OFF controllable and are meant to supply power to the components on target board. Signed-off-by: Venu Byravarasu <vbyravarasu@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: gpio-regulator: Set the smallest voltage/current in the specified ↵Axel Lin2012-04-01
| | | | | | | | | | | | range Do not assume the gpio regulator states map is sorted in any order. This patch ensures we always set the smallest voltage/current that falls within the specified range. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: fixed: Don't supply voltage change ops when no GPIO is givenMark Brown2012-04-01
| | | | | | | | | | Rather than replicating the core support for always on regulators use a different set of ops with none of the enable related operations provided when we don't have any ops. This ensures that we automatically pick up any enhanced support for such regulators that the core has such as the warnings about regulation constraints that can't be used. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: fixed: Use devm_kzalloc()Mark Brown2012-04-01
| | | | Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Use tps65912_get_voltage for both DCDCs and LDOsAxel Lin2012-04-01
| | | | | | | | Now tps65912_get_voltage_dcdc and tps65912_get_voltage_ldo has exactly the same implementation. We can merge them to tps65912_get_voltage function. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Implement tps65912_list_voltage to be shared by both DCDCs and LDOsAxel Lin2012-04-01
| | | | | | | | | Merge tps65912_list_voltage_dcdc and tps65912_list_voltage_ldo to tps65912_list_voltage. This change does not add too much complexity in tps65912_list_voltage function. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: max8952: Simplify the logic to get vid[0|1] statusAxel Lin2012-04-01
| | | | | | | | The syntax "(((vid >> 1) % 2) == 1)" is inefficient and also hard to read. Use bitwidse AND operator instead. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Convert ab3100 to set_voltage_selAxel Lin2012-04-01
| | | | | | Signed-off-by: Axel Lin <axel.lin@gmail.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Convert ab8500 to set_voltage_selAxel Lin2012-04-01
| | | | | | | | | Convert ab8500 to set_voltage_sel and then we can remove ab8500_get_best_voltage_index function. Signed-off-by: Axel Lin <axel.lin@gmail.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Convert pcf50633 to get_voltage_selAxel Lin2012-04-01
| | | | | | | | | | Convert pcf50633 to get_voltage_sel and then we can remove pcf50633_regulator_voltage_value function and move its implementation to pcf50633_regulator_list_voltage. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: pcf50633: Don't write to reserved bits of AUTO output voltage ↵Axel Lin2012-04-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | select register The datasheet says 00000000 to 00101110 are reserved, and the min value of the voltage setting is 1.8 V. Thus don't write 0 to AUTO output voltage select register (address 1Ah). Table 50. AUTOOUT - AUTO output voltage select register (address 1Ah) bit description[1] Bit Symbol Access Description 7:0 auto_out R/W VO(prog) = 0.625 + auto_out × 0.025 V eg. 00000000 to 00101110: reserved 00101111: 1.8 V (min) 01010011: 2.7 V 01101010: 3.275 V 01101011: 3.300 V 01101100: 3.325 V 01111111 : 3.800 V (max) ..... ..... 11111110 : 3.800 V 11111111 : 3.800 V This patch also fixes a bug in pcf50633_regulator_list_voltage: In regulator core _regulator_do_set_voltage function: if (rdev->desc->ops->set_voltage) { ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV, &selector); if (rdev->desc->ops->list_voltage) selector = rdev->desc->ops->list_voltage(rdev, selector); else selector = -1; The list_voltage call here takes the selector got from set_voltage callback. Thus adding 0x2f to the index in pcf50633_regulator_list_voltage looks wrong to me. e.g. If min_uV < 1.8V, pcf50633_regulator_set_voltage sets 0 to selector. For this case, adding 0x2f to the index in pcf50633_regulator_list_voltage is correct. However, if min_uV == 1.8V, pcf50633_regulator_set_voltage sets 0x2f to selector. Adding 0x2f to the index in pcf50633_regulator_list_voltage in this case is wrong. What this patch does is: The minimal voltage setting for AUTOOUT is 0x2f. Thus for the case min_uV < 1.8, set the voltage setting to 1.8V by writting 0x2f to AUTOOUT register and set selector = 0x2f. So we don't write the rserved range to AUTOOUT register. Which means the possible range of AUTOOUT register value is 0x2f ~ 0xff. We have no problem in regulator_get_voltage. Since we won't write 0~0x2e to AUTOOUT register, we have no problem converting the bits we read to voltage. The equation in auto_voltage_value works fine. For list_voltage, we need to take into account the case selector is 0 ~ 0x2e because the regulator core assumes the selector is starting from 0. This patch returns 0 for the cases selector is 0 ~ 0x2e, which means "this selector code can't be used on this system". The regulator core iterates from 0 to n_voltages to find the small voltage in the specific range. The n_voltages settings for AUTOOUT should be 128 now, including the reserved range of AUTOOUT. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regulator: Add support s5m8767 opmode operationSangbeom Kim2012-04-01
| | | | | | | | S5M8767A has 4 operation mode for BUCK/LDOs. This patch can handle opmode for s5m8767a. Signed-off-by: Sangbeom Kim <sbkim73@samsung.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* mfd: Add s5m regulator operation modeSangbeom Kim2012-04-01
| | | | | | | | | | | | This patch add variables for opmode of s5m series. S5M series have 4 operation modes. Off mode is always regulator off mode. On mode is always regulator on mode. Lowpower mode is that regualtor operate in low-power. Suspend mode is that regulator operation depends on AP suspend mode. Signed-off-by: Sangbeom Kim <sbkim73@samsung.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* Linux 3.4-rc1Linus Torvalds2012-03-31
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* Merge branch 's3-for-3.4' of ↵Linus Torvalds2012-03-31
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/amit/virtio-console Pull virtio S3 support patches from Amit Shah: "Turns out S3 is not different from S4 for virtio devices: the device is assumed to be reset, so the host and guest state are to be assumed to be out of sync upon resume. We handle the S4 case with exactly the same scenario, so just point the suspend/resume routines to the freeze/restore ones. Once that is done, we also use the PM API's macro to initialise the sleep functions. A couple of cleanups are included: there's no need for special thaw processing in the balloon driver, so that's addressed in patches 1 and 2. Testing: both S3 and S4 support have been tested using these patches using a similar method used earlier during S4 patch development: a guest is started with virtio-blk as the only disk, a virtio network card, a virtio-serial port and a virtio balloon device. Ping from guest to host, dd /dev/zero to a file on the disk, and IO from the host on the virtio-serial port, all at once, while exercising S4 and S3 (separately) were tested. They all continue to work fine after resume. virtio balloon values too were tested by inflating and deflating the balloon." Pulling from Amit, since Rusty is off getting married (and presumably shaving people). * 's3-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/amit/virtio-console: virtio-pci: switch to PM ops macro to initialise PM functions virtio-pci: S3 support virtio-pci: drop restore_common() virtio: drop thaw PM operation virtio: balloon: Allow stats update after restore from S4
| * virtio-pci: switch to PM ops macro to initialise PM functionsAmit Shah2012-03-30
| | | | | | | | | | | | | | Use the SET_SYSTEM_SLEEP_PM_OPS macro to initialise the suspend/resume functions in the new PM API. Signed-off-by: Amit Shah <amit.shah@redhat.com>
| * virtio-pci: S3 supportAmit Shah2012-03-30
| | | | | | | | | | | | | | | | | | There's no difference in supporting S3 and S4 for virtio devices: the vqs have to be re-created as the device has to be assumed to be reset at restore-time. Since S4 already handles this situation, we can directly use the same code and callbacks for S3 support. Signed-off-by: Amit Shah <amit.shah@redhat.com>
| * virtio-pci: drop restore_common()Amit Shah2012-03-30
| | | | | | | | | | | | | | restore_common() was shared between restore and thaw callbacks. With thaw gone, we don't need restore_common() anymore. Signed-off-by: Amit Shah <amit.shah@redhat.com>
| * virtio: drop thaw PM operationAmit Shah2012-03-30
| | | | | | | | | | | | | | The thaw operation was used by the balloon driver, but after the last commit there's no reason to have separate thaw and restore callbacks. Signed-off-by: Amit Shah <amit.shah@redhat.com>
| * virtio: balloon: Allow stats update after restore from S4Amit Shah2012-03-30
| | | | | | | | | | | | | | | | | | There's no reason stats update after restore can't work. If a host requested for stats, and before servicing the request, the guest entered S4, upon restore, the stats request can still be processed and sent off to the host. Signed-off-by: Amit Shah <amit.shah@redhat.com>
* | Merge branch 'for-linus' of ↵Linus Torvalds2012-03-31
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull second try at vfs part d#2 from Al Viro: "Miklos' first series (with do_lookup() rewrite split into edible chunks) + assorted bits and pieces. The 'untangling of do_lookup()' series is is a splitup of what used to be a monolithic patch from Miklos, so this series is basically "how do I convince myself that his patch is correct (or find a hole in it)". No holes found and I like the resulting cleanup, so in it went..." Changes from try 1: Fix a boot problem with selinux, and commit messages prettied up a bit. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (24 commits) vfs: fix out-of-date dentry_unhash() comment vfs: split __lookup_hash untangling do_lookup() - take __lookup_hash()-calling case out of line. untangling do_lookup() - switch to calling __lookup_hash() untangling do_lookup() - merge d_alloc_and_lookup() callers untangling do_lookup() - merge failure exits in !dentry case untangling do_lookup() - massage !dentry case towards __lookup_hash() untangling do_lookup() - get rid of need_reval in !dentry case untangling do_lookup() - eliminate a loop. untangling do_lookup() - expand the area under ->i_mutex untangling do_lookup() - isolate !dentry stuff from the rest of it. vfs: move MAY_EXEC check from __lookup_hash() vfs: don't revalidate just looked up dentry vfs: fix d_need_lookup/d_revalidate order in do_lookup ext3: move headers to fs/ext3/ migrate ext2_fs.h guts to fs/ext2/ext2.h new helper: ext2_image_size() get rid of pointless includes of ext2_fs.h ext2: No longer export ext2_fs.h to user space mtdchar: kill persistently held vfsmount ...