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path: root/drivers/mtd/devices
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2012-12-13mtd: block2mtd: throttle writes by calling balance_dirty_pages_ratelimited.NeilBrown
If you create a block2mtd device that is larger than main memory, and write to all of it, then lots of pages will be dirtied but they will never be flushed out as nothing calls any variant of balance_dirty_pages. It would be nice to call set_page_dirty_balance(), but that isn't exported, so just call balance_dirty_pages_ratelimited() directly. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-12-10mtg: docg3: potential divide by zero in doc_write_oob()Dan Carpenter
If we set oobdelta to zero then we will either return -EINVAL or hit a divide (modulus) by zero on the next line when we check "(ooblen % oobdelta)". It's better to just return -EINVAL here instead. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-12-03mtd: m25p80: modify info for Micron N25Q128Liming Wang
Micron N25Q128 has two types of flash: - One is for 1.8v supply voltage, prefixed with "n25q128a11" and the jedec code is 0x20bb18. - Another is for 3v supply voltage, prefixed with "n25q128a13" and the jedec code is 0x20ba18. So modify the original type info and add another type for Micron N25Q128. Signed-off-by: Liming Wang <walimisdev@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-22mtd: fix a number of checkpatch complaintsArtem Bityutskiy
While checking the "__devinit" removal patches with checkpatch.pl, I noticed several warnings related to a space between the function name and '(', as well as long lines. I fixed the warnings up in this patch. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-22mtd: remove use of __devexitBill Pemberton
CONFIG_HOTPLUG is going away as an option so __devexit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-22mtd: remove use of __devinitdataBill Pemberton
CONFIG_HOTPLUG is going away as an option so __devinitdata is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-22mtd: remove use of __devinitBill Pemberton
CONFIG_HOTPLUG is going away as an option so __devinit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-22mtd: remove use of __devexit_pBill Pemberton
CONFIG_HOTPLUG is going away as an option so __devexit_p is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-22mtd: m25p80: add support for the Winbond w25q80bl chipStephen Warren
Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-16mtd: diskonchip: don't warn about ARM architectureArnd Bergmann
Enabling the diskonchip drivers on most architectures results in a pointless warning "#warning Unknown architecture for DiskOnChip. No default probe locations defined". The driver can in fact handle the default location already through the CONFIG_MTD_DOCPROBE_ADDRESS, which gets set on the platforms that need it, and we get a run-time error if this is not set correctly. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15mtd: spear_smi: use module_platform_driver macroSrinivas Kandagatla
This patch removes some code duplication by using module_platform_driver. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15mtd: m25p80: add support for the windbond w25q256 chipMatthieu CASTET
Signed-off-by: Matthieu CASTET <matthieu.castet@parrot.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15mtd: m25p80: Make fast read configurable via DTMarek Vasut
Add DT property "m25p,fast-read" that signalises the particular chip supports "fast read" opcode. Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-09mtd: slram: invalid checking of absolute end addressJiri Engelthaler
Fixed parsing end absolute address. Signed-off-by: Jiri Engelthaler <engycz@gmail.com> Cc: stable@vger.kernel.org Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-09-29mtd: m25p80: Disable 4KiB erase for s25sl032p, s25sl064pMarek Vasut
Quoting from the datasheet for S25FL064P, rev. 05, Nov 18 2011, § 9.17: "A 64 kB[sic] sector erase (D8h) command issued on 4 kB or 8 kB erase sectors will erase all sectors in the specified 64 kB region. However, please note that a 4 kB sector erase (20h) or 8 kB sector erase (40h) command will not work on a 64 kB sector." Referring further to Table 8.1 and Table 8.2, it is clearly seen that most of the sectors are 64KiB; therefore disable this 4KiB erase support since it's valid only on first/last sectors. Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-09-29mtd: basic (read only) driver for BCMA serial flashRafał Miłecki
This registers MTD driver for serial flash platform device. Right now it supports reading only, writing still has to be implemented. Artem: minor amendments. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-09-29mtd: m25p80: add support for the EON EN25Q64 chipGabor Juhos
Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-09-29mtd: m25p80: add support for Micron N25Q128Jan Luebbe
Signed-off-by: Jan Luebbe <jlu@pengutronix.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-09-29mtd: spear_smi: use devm_ functions consistentlyJulia Lawall
Use devm_kzalloc for all calls to kzalloc and not just the first. Use devm functions for other allocations as well. Move the call to platform_get_resource(pdev, IORESOURCE_MEM, 0) closer to where its result is passed to devm_request_and_ioremap to make the lack of need for a NULL test more evident. The semantic match that finds the inconsistency is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ @@ *devm_kzalloc(...) ... *kzalloc(...) // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-09-29mtd: m25p80: add support for Micron N25Q256AVivien Didelot
The manufacturer datasheet can be found on the Micron website, under the name n25q_256mb_3v_65nm.pdf: http://www.micron.com/search?source=ps&q=n25q_256mb_3v_65nm Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-09-29mtd: use %*ph[CN] to dump small buffersAndy Shevchenko
There is new format specified that helps to dump small buffers. It makes the code simpler and nicer. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Jiandong Zheng <jdzheng@broadcom.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-09-29mtd: spear_smi: fix compilation warningArtem Bityutskiy
drivers/mtd/devices/spear_smi.c: In function 'spear_smi_probe': drivers/mtd/devices/spear_smi.c:984:2: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits] Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-09-29mtd: spear_smi: failure test for null rather than negative integerJulia Lawall
dev_get_platdata returns a pointer, so the failure value would be NULL rather than a negative integer. The semantic match that finds this problem is: (http://coccinelle.lip6.fr/) // <smpl> @@ expression x,e; statement S1,S2; @@ *x = dev_get_platdata(...) ... when != x = e *if (x < 0) S1 else S2 // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Acked-by: Stefan Roese <sr@denx.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-09-29mtd: m25p80: Fix the Spansion chip detectionMarek Vasut
Due to the implementation of the following loop at the end of jedec_probe(): 776 for (tmp = 0; tmp < ARRAY_SIZE(m25p_ids) - 1; tmp++) { 777 info = (void *)m25p_ids[tmp].driver_data; 778 if (info->jedec_id == jedec) { 779 if (info->ext_id != 0 && info->ext_id != ext_jedec) 780 continue; 781 return &m25p_ids[tmp]; 782 } 783 } In particular line 779 in the above numbering, the chips with ext_id != 0 must be ordered first in the list of chips (m25p_ids[]). Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-09-29mtd: m25p80: add support for Spansion s25sl064p chipMarek Vasut
Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-07-17mtd: m25p80: Add support for serial flash STM/Micron N25Q032Knut Wohlrab
Signed-off-by: Knut Wohlrab <knut.wohlrab@de.bosch.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-07-06mtd: spear_smi: handle return value of timeouts properlyVipin Kumar
Handle timouts in general and return value of 'wait_event_interruptible_timeout' in particular, to capture all conditions. 'wait_event_interruptible_timeout' returns either of the following three values :- * 0 - time out occurred. * negative * -ERESTARTSYS - return because of a signal * other - for a real error * positive - time remaining Fix particularly 'ERESTARTSYS' condition which is not properly handled by the smi driver at a couple of places leading to an erroneous situation. Signed-off-by: Antonio BORNEO <antonio.borneo@st.com> Signed-off-by: Shiraz Hashim <shiraz.hashim@st.com> Signed-off-by: Vipin Kumar <vipin.kumar@st.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-07-06mtd: spear_smi: clear status register on initShiraz Hashim
It was observed that sometimes smi returned errors while resume from suspend. For safety reasons clear status register for any errors during init. In absence of it smi can return failures during command transmissions. Signed-off-by: Shiraz Hashim <shiraz.hashim@st.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-07-06mtd: spear_smi: Move suspend/resume to follow dev_pm_opsViresh Kumar
Use dev_pm_ops to support PM specific callbacks. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-07-06mtd: fix bogus inequationMarek Vasut
Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-07-06mtd: m25p80: Add support for Atmel at45db081dChunhe Lan
Signed-off-by: Chunhe Lan <Chunhe.Lan@freescale.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-07-06mtd: m25p80: Add support for n25q064Alexandre Pereira da Silva
Signed-off-by: Alexandre Pereira da Silva <aletes.xgr@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-07-06mtd: m25p80: Add support for m25pe20Alexandre Pereira da Silva
Signed-off-by: Alexandre Pereira da Silva <aletes.xgr@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-07-06mtd: add JEDEC ID for w25q32dw to chip tableing. Federico Fuga
Adds JEDEC ID for the 1.8V version of WinBond w25q32. Signed-off-by: Federico Fuga <fuga@studiofuga.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-06-01Merge tag 'for-linus-3.5-20120601' of git://git.infradead.org/linux-mtdLinus Torvalds
Pull mtd update from David Woodhouse: - More robust parsing especially of xattr data in JFFS2 - Updates to mxc_nand and gpmi drivers to support new boards and device tree - Improve consistency of information about ECC strength in NAND devices - Clean up partition handling of plat_nand - Support NAND drivers without dedicated access to OOB area - BCH hardware ECC support for OMAP - Other fixes and cleanups, and a few new device IDs Fixed trivial conflict in drivers/mtd/nand/gpmi-nand/gpmi-nand.c due to added include files next to each other. * tag 'for-linus-3.5-20120601' of git://git.infradead.org/linux-mtd: (75 commits) mtd: mxc_nand: move ecc strengh setup before nand_scan_tail mtd: block2mtd: fix recursive call of mtd_writev mtd: gpmi-nand: define ecc.strength mtd: of_parts: fix breakage in Kconfig mtd: nand: fix scan_read_raw_oob mtd: docg3 fix in-middle of blocks reads mtd: cfi_cmdset_0002: Slight cleanup of fixup messages mtd: add fixup for S29NS512P NOR flash. jffs2: allow to complete xattr integrity check on first GC scan jffs2: allow to discriminate between recoverable and non-recoverable errors mtd: nand: omap: add support for hardware BCH ecc ARM: OMAP3: gpmc: add BCH ecc api and modes mtd: nand: check the return code of 'read_oob/read_oob_raw' mtd: nand: remove 'sndcmd' parameter of 'read_oob/read_oob_raw' mtd: m25p80: Add support for Winbond W25Q80BW jffs2: get rid of jffs2_sync_super jffs2: remove unnecessary GC pass on sync jffs2: remove unnecessary GC pass on umount jffs2: remove lock_super mtd: gpmi: add gpmi support for mx6q ...
2012-06-01mtd: block2mtd: fix recursive call of mtd_writevGabor Juhos
The 'mtd_writev' interface calls the function assigned to the '_write' field of a given mtd device if that is not NULL. The block2mtd driver sets the '_writev' field to the 'mtd_writev' function itself and thus causes a endless loop. This is caused by 1dbebd32562b3c2caeca35960e5cb00bfcc12900 (mtd: harmonize mtd_writev usage). Remove the assignment from the block2mtd driver to fix the issue. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Cc: stable@kernel.org [3.3+] Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-05-29mtd: docg3 fix in-middle of blocks readsRobert Jarzmik
Corner case reads do not work, and return false data and ECC. This case is typically seen in a ubifs usage, with a read of type: - docg3 docg3: doc_read_oob(from=14882415, mode=1, data=(c30eca40:12), oob=( (null):0)) This results in the following reads: - docg3 docg3: doc_read_data_area(buf= (null), len=111) - docg3 docg3: doc_read_data_area(buf=c30eca40, len=12) - docg3 docg3: doc_read_data_area(buf= (null), len=389) - docg3 docg3: doc_read_data_area(buf= (null), len=0) - docg3 docg3: doc_read_data_area(buf= (null), len=16) If we suppose that the pages content is : - bytes 0 .. 111 : 0x0a - bytes 112 .. 255 : 0x0f Then the returned bytes will be : - 111 times 0x0a (correct) - 0x0a 2 times and 0x0f 10 times (incorrect, should be 0x0a,0x0f) - 0x0f 389 times (correct) - nothing - correct OOB The reason seams that the first 111 bytes read ends between the 2 docg3 planes, and that the first following read (in the 12 bytes sequence, read of 16 bit word) returns the byte of the rightmost plane duplicated in high and lower byte of the word. Fix this behaviour by ensuring that if the previous read ended up in-between the 2 planes, there will be a first 1 byte read to get back to the beginning of leftmost plane. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-05-13mtd: m25p80: Add support for Winbond W25Q80BWThomas Abraham
Winbond W25Q80BW is a 8Mbit serial flash memory device. Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-05-13mtd: add m25p80 id for mx25l2005aJohn Crispin
Add the id and sector mappings for mx25l2005a flash chips. Signed-off-by: John Crispin <blogic@openwrt.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-05-13mtd: m25p80: add support for Everspin MR25H256 MRAM chipMarek Vasut
This chip isn't JEDEC-compatible. Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-05-13mtd: driver _read() returns max_bitflips; mtd_read() returns -EUCLEANMike Dunn
The drivers' _read() method, absent an error, returns a non-negative integer indicating the maximum number of bit errors that were corrected in any one region comprising an ecc step. MTD returns -EUCLEAN if this is >= bitflip_threshold, 0 otherwise. If bitflip_threshold is zero, the comparison is not made since these devices lack ECC and always return zero in the non-error case (thanks Brian)¹. Note that this is a subtle change to the driver interface. This and the preceding patches in this set were tested with ubi on top of the nandsim and docg4 devices, running the ubi test io_basic from mtd-utils. ¹ http://lists.infradead.org/pipermail/linux-mtd/2012-March/040468.html Signed-off-by: Mike Dunn <mikedunn@newsguy.com> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Acked-by: Brian Norris <computersforpeace@gmail.com> Ivan Djelic <ivan.djelic@parrot.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-05-13mtd: block2mtd: page_read() never returns NULLRyosuke Saito
page_read() never returns NULL, so we can remove the NULL check here. Signed-off-by: Ryosuke Saito <raitosyo@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-05-13mtd: spear_smi: Add clk_{un}prepare() supportViresh Kumar
clk_{un}prepare is mandatory for platforms using common clock framework. Since this driver is used by SPEAr platform, which supports common clock framework, add clk_{un}prepare() support for it. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-04-08Merge branch 'master' into for-nextJiri Kosina
Merge with latest Linus' tree, as I have incoming patches that fix code that is newer than current HEAD of for-next. Conflicts: drivers/net/ethernet/realtek/r8169.c
2012-04-05mtg: docg3: fix comment errorsOctavian Moraru
occured ==> occurred successfull ==> successful adressing ==> addressing Signed-off-by: Octavian Moraru <octmoraru@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-03-30Merge tag 'for-linus-3.4' of git://git.infradead.org/mtd-2.6Linus Torvalds
Pull MTD changes from David Woodhouse: - Artem's cleanup of the MTD API continues apace. - Fixes and improvements for ST FSMC and SuperH FLCTL NAND, amongst others. - More work on DiskOnChip G3, new driver for DiskOnChip G4. - Clean up debug/warning printks in JFFS2 to use pr_<level>. Fix up various trivial conflicts, largely due to changes in calling conventions for things like dmaengine_prep_slave_sg() (new inline wrapper to hide new parameter, clashing with rewrite of previously last parameter that used to be an 'append' flag, and is now a bitmap of 'unsigned long flags'). (Also some header file fallout - like so many merges this merge window - and silly conflicts with sparse fixes) * tag 'for-linus-3.4' of git://git.infradead.org/mtd-2.6: (120 commits) mtd: docg3 add protection against concurrency mtd: docg3 refactor cascade floors structure mtd: docg3 increase write/erase timeout mtd: docg3 fix inbound calculations mtd: nand: gpmi: fix function annotations mtd: phram: fix section mismatch for phram_setup mtd: unify initialization of erase_info->fail_addr mtd: support ONFI multi lun NAND mtd: sm_ftl: fix typo in major number. mtd: add device-tree support to spear_smi mtd: spear_smi: Remove default partition information from driver mtd: Add device-tree support to fsmc_nand mtd: fix section mismatch for doc_probe_device mtd: nand/fsmc: Remove sparse warnings and errors mtd: nand/fsmc: Add DMA support mtd: nand/fsmc: Access the NAND device word by word whenever possible mtd: nand/fsmc: Use dev_err to report error scenario mtd: nand/fsmc: Use devm routines mtd: nand/fsmc: Modify fsmc driver to accept nand timing parameters via platform mtd: fsmc_nand: add pm callbacks to support hibernation ...
2012-03-28Merge tag 'split-asm_system_h-for-linus-20120328' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system Pull "Disintegrate and delete asm/system.h" from David Howells: "Here are a bunch of patches to disintegrate asm/system.h into a set of separate bits to relieve the problem of circular inclusion dependencies. I've built all the working defconfigs from all the arches that I can and made sure that they don't break. The reason for these patches is that I recently encountered a circular dependency problem that came about when I produced some patches to optimise get_order() by rewriting it to use ilog2(). This uses bitops - and on the SH arch asm/bitops.h drags in asm-generic/get_order.h by a circuituous route involving asm/system.h. The main difficulty seems to be asm/system.h. It holds a number of low level bits with no/few dependencies that are commonly used (eg. memory barriers) and a number of bits with more dependencies that aren't used in many places (eg. switch_to()). These patches break asm/system.h up into the following core pieces: (1) asm/barrier.h Move memory barriers here. This already done for MIPS and Alpha. (2) asm/switch_to.h Move switch_to() and related stuff here. (3) asm/exec.h Move arch_align_stack() here. Other process execution related bits could perhaps go here from asm/processor.h. (4) asm/cmpxchg.h Move xchg() and cmpxchg() here as they're full word atomic ops and frequently used by atomic_xchg() and atomic_cmpxchg(). (5) asm/bug.h Move die() and related bits. (6) asm/auxvec.h Move AT_VECTOR_SIZE_ARCH here. Other arch headers are created as needed on a per-arch basis." Fixed up some conflicts from other header file cleanups and moving code around that has happened in the meantime, so David's testing is somewhat weakened by that. We'll find out anything that got broken and fix it.. * tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system: (38 commits) Delete all instances of asm/system.h Remove all #inclusions of asm/system.h Add #includes needed to permit the removal of asm/system.h Move all declarations of free_initmem() to linux/mm.h Disintegrate asm/system.h for OpenRISC Split arch_align_stack() out from asm-generic/system.h Split the switch_to() wrapper out of asm-generic/system.h Move the asm-generic/system.h xchg() implementation to asm-generic/cmpxchg.h Create asm-generic/barrier.h Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h Disintegrate asm/system.h for Xtensa Disintegrate asm/system.h for Unicore32 [based on ver #3, changed by gxt] Disintegrate asm/system.h for Tile Disintegrate asm/system.h for Sparc Disintegrate asm/system.h for SH Disintegrate asm/system.h for Score Disintegrate asm/system.h for S390 Disintegrate asm/system.h for PowerPC Disintegrate asm/system.h for PA-RISC Disintegrate asm/system.h for MN10300 ...
2012-03-28Remove all #inclusions of asm/system.hDavid Howells
Remove all #inclusions of asm/system.h preparatory to splitting and killing it. Performed with the following command: perl -p -i -e 's!^#\s*include\s*<asm/system[.]h>.*\n!!' `grep -Irl '^#\s*include\s*<asm/system[.]h>' *` Signed-off-by: David Howells <dhowells@redhat.com>
2012-03-27mtd: docg3 add protection against concurrencyRobert Jarzmik
As docg3 is intolerant against reentrancy, especially because of its weird register access (ie. a register read is performed by a first register write), each access to the docg3 IO space must be locked. Lock the IO space with a mutex, shared by all chips on the same cascade, as they all share the same IO space. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2012-03-27mtd: docg3 refactor cascade floors structureRobert Jarzmik
Group floors into a common cascade structure. This will provide a common structure to store common data to all cascaded docg3 chips, like IO addressing, locking protection. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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