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2021-12-06mtd-tests: use pages during readtest and stressRalph Siemsen
Same fix as a2c6bbc ("mtd-tests: Read and write pages during speed tests") but applied to flash_readtest and flash_stress. Resolves failure of flash_readtest when subpages are present. The test reads a (sub)page followed by the entire OOB. Upon reaching the 2nd subpage, the OOB read fails because it is beyond the end of OOB. Signed-off-by: Ralph Siemsen <ralph.siemsen@linaro.org> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2021-10-13mtd-tests: Read and write pages during speed testsMiquel Raynal
The speed test does reads and writes of different sizes: - eraseblock - page - two pages At least this is the theory because, as opposed to the legacy kernel module doing the same measurement, the userspace tool uses the subpage size (hence accessing the same page 4, 8 or 16 times depending on the subpage setting). Of course if the controller does not support subpages, this issue is not visible. Use mtd.min_io_size instead for non-NOR devices in order to get the right bandwidth (at least one that fits the logs). Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2021-07-25Add missing filljffs2.sh to EXTRA_DISTDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2021-01-20Fix test binary installationDavid Oberhollenzer
- Remove "install tests" configure option, we already have an option whether to build tests or not. Don't try to work around autotools semantics that people building the package expect. - Fix the installation path by propperly defining it and using the correct name for the libexec path. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2021-01-20Cleanup: Automake: remove single use variablesDavid Oberhollenzer
Throughout the Automake files, there is a consistent pattern somewhat like this: FOO_BINS = .... sbin_PROGRAMS += $(FOO_BINS) This commit all such patterns whenever the variable is not used anywhere else and appends to the target directly. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2021-01-20Remove headers from EXTRA_DISTDavid Oberhollenzer
This commit removes the C header files from the EXTRA_DIST variables and instead assigns them to the SOURCE variable of the respective components they belong to. This takes care of having them distributed in the release tar ball and helps with dependency tracking a little. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-09mtd-utils: Fix potentially unterminated stringsDavid Oberhollenzer
This commit fixes some uses of strncpy that could leave the destination buffer unterminated. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-09mtd-utils: Fix potential negative arguments passed to close(2)David Oberhollenzer
Many tools open a file descriptor, close it a the end and have some form of error path in between that jumps to the end. In some cases, if opening the file fails the error path is taken and the utility ends up closing one or more invalid file descriptors. It's technically not a real issue but something that pretty much any static analysis tool barks at. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-09mtd-utils: Fix printf format specifiers with the wrong typeDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-10fs-tests: don't leak temporary buffersDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-10jittertest: fix error check for open system callDavid Oberhollenzer
The value 0 is a valid file descriptor. The existing error handling would not only treat that as an error, but subsequently leak the file descriptor in the error handling path. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-16ubi-tests: fm_param: Replace 'fm_auto' with 'fm_autoconvert'Zhihao Cheng
The value of fm_param should be 'fm_autoconvert' rather than 'fm_auto' when fastmap is supported by kernel. Currently, following verbose will appear in dmesg when fm_param is set to 'fm_auto': ubi: unknown parameter 'fm_auto' ignored This patch replace 'fm_auto' with 'fm_autoconvert' for fm_param, so ubi kernel module can receive correct parameters. ---------------------------------------- Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-16ubi-tests: mkvol test: Checks return value 'ENOSPC' for 'ubi_mkvol'Zhihao Cheng
UBI tests try to create too many volumes in mkvol_bad and mkvol_basic. Currently mtd-utils allows return value 'ENFILE' from 'ubi_mkvol', that works fine in most situations. But what if the number of PEBs equals to the maximum count of volumes? For example, mkvol_basic test will fail in a 64MiB flash with 512KiB PEB size. Following is the output of mkvol_basic test: ====================================================================== ====================================================================== ====================================================================== Test on mtdram, fastmap enabled, VID header offset factor 1 ====================================================================== ====================================================================== ====================================================================== mtdram: 64MiB, PEB size 512KiB, fastmap enabled Running mkvol_basic /dev/ubi0 [mkvol_basic] mkvol_multiple():182: function ubi_mkvol() failed with error 28 (No space left on device) [mkvol_basic] mkvol_multiple():183: vol_id 122 Error: mkvol_basic failed FAILURE The reason is that there is no available PEB to support a new volume. We can see following verbose in dmesg: ubi0: attached mtd0 (name "mtdram test device", size 64 MiB) ubi0: user volume: 0, internal volumes: 1, max. volumes count: 128 ubi0: available PEBs: 122, total reserved PEBs: 6, PEBs reserved for bad PEB handling: 0 The maximum count of volumes is 128, so we can create 128 volumes theoretically. But there are 122 available PEBs becauese of existence of reserved PEBs. In addition, a volume occupies at least one PEB. Actually, we can only create 122 volumes, Therefore, 'ubi_mkvol' returns 'ENOSPC' when mkvol_basic tries to create 123rd volume. And we can see corresponding error message in dmesg: ubi0 error: ubi_create_volume [ubi]: not enough PEBs, only 0 available ubi0 error: ubi_create_volume [ubi]: cannot create volume 122, error -28 So, 'ENOSPC' can happen before 'ENFILE' in flash with a small amount of PEBs. This patch checks return value 'ENOSPC' for 'ubi_mkvol' when mkvol test is trying to create too many volumes. ---------------------------------------- Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-16ubi-tests: io_read: Filter invalid offset value before 'lseek' in io_read testZhihao Cheng
There are many different offset values passed in 'lseek' during io_read testing of ubi test. The offset value maybe a negative number or a big number that exceeds the volume data size, which can lead to ubi tests failure by passing invalid offset value to 'lseek'. For example: Example 1: The data size of volume is 39525 bytes, offset = (sz) - MAX_NAND_PAGE_SIZE - 1, where MAX_NAND_PAGE_SIZE is 65536. Here, offset is a negative value passed to 'lseek', which leads to fail in io_read. ====================================================================== ====================================================================== ====================================================================== Test on mtdram, fastmap enabled, VID header offset factor 1 ====================================================================== ====================================================================== ====================================================================== mtdram: 16MiB, PEB size 16KiB, fastmap enabled Running mkvol_basic /dev/ubi0 Running mkvol_bad /dev/ubi0 Running mkvol_paral /dev/ubi0 Running rsvol /dev/ubi0 Running io_basic /dev/ubi0 Running io_read /dev/ubi0 [io_basic] test_read3():189: function seek() failed with error 22 (Invalid argument) [io_basic] test_read3():190: len = 1 [io_basic] test_read2():237: offset = -26012 [io_basic] test_read1():303: length = 1 [io_basic] test_read():362: alignment = 7905 Error: io_read failed FAILURE Example 2: The data size of volume is 79035 bytes, offset = 2 * MAX_NAND_PAGE_SIZE, where MAX_NAND_PAGE_SIZE is 65536. Here, offset is a value exceeds volume size, which leads to fail in io_read. ====================================================================== ====================================================================== ====================================================================== Test on mtdram, fastmap enabled, VID header offset factor 1 ====================================================================== ====================================================================== ====================================================================== mtdram: 16MiB, PEB size 16KiB, fastmap enabled Running mkvol_basic /dev/ubi0 Running mkvol_bad /dev/ubi0 Running mkvol_paral /dev/ubi0 Running rsvol /dev/ubi0 Running io_basic /dev/ubi0 Running io_read /dev/ubi0 [io_basic] test_read3():185: function seek() failed with error 22 (Invalid argument) [io_basic] test_read3():186: len = 1 [io_basic] test_read2():233: offset = 131072 [io_basic] test_read1():299: length = 1 [io_basic] test_read():358: alignment = 3 Error: io_read failed FAILURE This patch checks offset value before executing 'lseek', invalid offset values are filtered. ---------------------------------------- Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-06-16ubi-tests: ubi_mkvol_request: Fully initialize 'struct ubi_mkvol_request req'Zhihao Cheng
'struct ubi_mkvol_request req' is one parameter of the function 'ubi_mkvol' , this parameter will be passed to kernel and then be checked. It acts as a local variable in many ubi tests, such as io_basic, io_read, mkvol_bad, mkvol_basic, etc. After commit c355aa465fce ("ubi: expose the volume CRC check skip flag") in linux-stable, 'struct ubi_mkvol_request' supports a new configuration named 'flags', and req.flags will be checked in kernel function 'verify_mkvol_req'. Currently, there is no initialization for req.flags before 'ubi_mkvol' invoked. So, req.flags can be an arbitrary number passed to kernel. When we run ubi tests in qemu (x86_64, kernel image: 5.2.0-rc4), the following errors may occur: ====================================================================== ====================================================================== ====================================================================== Test on mtdram, fastmap enabled, VID header offset factor 1 ====================================================================== ====================================================================== ====================================================================== mtdram: 16MiB, PEB size 16KiB, fastmap enabled Running mkvol_basic /dev/ubi0 Running mkvol_bad /dev/ubi0 [mkvol_bad] test_mkvol():105: ubi_mkvol failed with error 22 (Invalid argument), expected 28 (No space left on device) [mkvol_bad] test_mkvol():105: bytes = 16060929 Error: mkvol_bad failed FAILURE This patch fully initializes every 'struct ubi_mkvol_request req' passed to 'ubi_mkvol', which can fix the bug that the ubi test failed caused by that req.flags was not initialized. And it is still compatible with old kernel before kernel commit c355aa465fce ("ubi: expose the volume CRC check skip flag"). ---------------------------------------- Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-04-29mtd-tests: nandbiterrs: Fix issue that just insert error at bit 7Xiaolei Li
The function insert_biterror should be designed to insert error at the first '1' bit starting at offset byte. But now, only bit 7 of each byte is checked, because checking mask is always 0x80. So, do right shift for checking mask after each checking to check the whole 8 bits of each bytes. Signed-off-by: Xiaolei Li <xiaolei.li@mediatek.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-04-25unittests: Define the use of _GNU_SOURCEOlliver Schinagl
The unittest suite actually makes use of some _GNU extensions during the build (loff_t for example). So lets enable this in the makefile. Signed-off-by: Olliver Schinagl <oliver@schinagl.nl> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-04-25unittests/libmtd_test: Include fcntl headerOlliver Schinagl
The test library for the mtd unit tests include various type's and macro's that officially live in fcntl. Each file and header should always properly include what they use, so lets add the fcntl headers. Signed-off-by: Olliver Schinagl <oliver@schinagl.nl> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-04-25unittests/test_lib: Include proper header for _IOC_SIZEOlliver Schinagl
The macro _IOC_SIZE is not part of sys/ioctl.h but lives in asm/ioctl.h so we should include the proper header. If we do not, some systems complain during linking that they cannot find the symbol _IOC_SIZE() which was not expanded by the pre-compiler. Signed-off-by: Olliver Schinagl <oliver@schinagl.nl> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2018-10-02mtd-utils: Instead of doing preprocessor magic, just output off_t as long longThorsten Glaser
Fix warnings abot PRIdoff_t in libmtd.c, in mtd_read (and mtd_write): In file included from ../git/lib/libmtd.c:40:0: ../git/lib/libmtd.c: In function 'mtd_read': ../git/include/common.h:110:18: warning: format '%ld' expects argument of type 'long int', but argument 5 has type 'off_t {aka long long int}' [-Wformat=] ../git/include/common.h:120:2: note: in expansion of macro 'errmsg' errmsg(fmt, ##__VA_ARGS__); \ ^~~~~~ ../git/lib/libmtd.c:1082:10: note: in expansion of macro 'sys_errmsg' return sys_errmsg("cannot seek mtd%d to offset %"PRIdoff_t, ^~~~~~~~~~ /usr/lib/klibc/include/inttypes.h:28:17: note: format string is defined here #define PRId32 "d" Signed-off-by: Thorsten Glaser <tg@mirbsd.org> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2018-09-08ubi-tests: io_paral: Fix error handling of update_volume()Martin Lund
The io_paral test returns success even in case it throws e.g. the following error message: [io_paral] update_volume():125: written and read data are different This patch fixes so that the io_paral application returns a non-zero error code when an error is detected. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2018-04-16Fix unit-test header and file paths for out of tree buildsDavid Oberhollenzer
If we build mtd-utils outside the source path, we cannot use relative paths to refere to headers in the source tree. We have to specify absoulte paths using the top_srcdir variable. This was done right for the utility binaries, but overlooked for the unit test porgrams. This patch fixes the header paths and SYSROOT variable for the unit tests, so they build and run propperly outside the source tree. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2018-04-16Fix unit test mockup for oobavail sysfs fileDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2018-03-05mtd: tests: check erase block count in page testStefan Agner
When there is only a single erase block, the cross erase test does not report sensible errors. Warn in case there is only a single erase block instead of executing the test. Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2018-02-14mtd: unittests: Stop testing stat() callsBalint Reczey
Sometimes __xstat is called instead that makes tests fragile. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2018-02-14mtd: unittests: Decode arg size from ioctl requestBalint Reczey
Signed-off-by: Balint Reczey <balint.reczey@canonical.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2018-02-14mtd: unittests: Use proper unsigned long type for ioctl requestsBalint Reczey
This fixes tests on s390x Signed-off-by: Balint Reczey <balint.reczey@canonical.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-12-05Run unit test programs through "make check"David Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-11-22mtd: tests: Fix check on ebcnt in nandpagetestPaul HENRYS
If the number of erase blocks to use is not specified, ebcnt originally set to -1 leads the program to exit with: "Cannot run with less than two blocks." If the number of erase blocks to use is not specified and thus ebcnt is equal to -1, the expected behaviour is to perform the test on all the erase blocks of the mtd partition. This fixes the change introduced in 4458ad6481f60d9884925d5bc62a7954880d181b. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-11-03nandbiterrs: Fix copy & paste failDavid Oberhollenzer
When porting some of the mtd-tests to user space, some code was simplified. Among others, a while loop that iterates of page contents was replaced with a for loop, but the old increment was left in place, so every second byte was skipped. This patch removes the erroneous second increment. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-11-03Enable further warning flags, address new warningsDavid Oberhollenzer
mtd_debug: Remove a duplicate if case. MTD_CAP_NANDFLASH has only one flag set (MTD_WRITEABLE). Directly below, we had a check for MTD_WRITEABLE in the else branch which can't possible ever have triggered. Checking for MTD_WRITEABLE in addition to the CAP constants was probably not intended anyway, given the check for the individual flags if all else fails. integck: We already established that "r" is less than the number of elements in the list, so the loop condition doesn't need to check if w is NULL in addition. At least this way, the compiler "gets" that w cannot be NULL below and doesn't issue warnings. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-11-03jittertest: Use the appropriate versions of abs()David Oberhollenzer
When passing a long argument, actually use labs(). The other case of passing a float to "int abs(int)" and casting the result to an int doesn't really make sense. Pull the cast inside the abs(). Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-11-02Mark or fix switch cases that fall throughDavid Oberhollenzer
Now that C++17 introduced a special fallthrough keyword for explicitly tagging switch cases that are supposed to fall through, newer gcc versions also implement a feature request from 2002 to warn about maybe unwanted fall-throughs in switch cases in other languages (like C). For C code, we can either add a gcc specific attribute at the end of the switch case, or use a special comment that gcc checks for, indicating that the fall-through behaviour is indeed intended. This patch adds a "/* fall-through */" comment at the end of various case blocks to silence gcc warnings and in some cases a break, where fall-through was probably not intended. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-11-02Add no-return attribute to usage() style functionsDavid Oberhollenzer
A common pattern in command line processing is having a usage() function that prints out how to use the command line options and then terminates. The function is typically used inside a switch block for command line options like `-h' or unknown options. In a lot of places, the break keyword is omitted, because the function exits anyway. However, this triggers gcc warnings about implicit fall-through. Rather than adding a phony "/* fall-through */" this patch flags the usage() style function with a gcc attribute, indicating that they do not return and removes further superfluous break statements. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-10-05tests: checkfs: Remove unused source file from makefilesDavid Oberhollenzer
The file comm.c was erroneously compiled into makefiles. This patch fixes that in the Automake file. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-10-05ubi-tests: io_update: fix missleading indentationDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-08-24mtd-utils: tests: Avoid using less than two blocks in nandpagetestMiquel Raynal
Forbid the use of less than 2 eraseblocks in nandpagetest. It is obvious that the test cannot run on zero block, but it cannot run on only one block neither. The reason is: get_first_and_last_block() will return the same id for both the first and the last blocks. In erasecrosstest(), the logic is: - erase/write/read/verify first block - erase/write again first block - erase *last* block - read/verify first block When using only one block, 'first' refers to the same block as 'last', leading to erasing the block before reading it. Hence, the test would fail with no actual reason. Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-07-03mtd-utils: tests: Add Erased Pages Bit Flip TestHarpreet Eli Sangha
Bit flip detection for written and erased pages tend to have different implementations. Where written pages are detected and corrected using ECC, erased pages are typically detected by ensuring that the number of zeros is less than a specified threshold. As such, it's necessary to have the 'nandbiterrs' test support the testing of written and erased pages. Bit flips in erased pages are emulated by rewriting the page in raw mode, to prevent the use of ECC. Signed-off-by: Harpreet Eli Sangha <harpreet@nestlabs.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-06-28Add const modifier to read only strings and string constantsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-06-28Silence warnings about unused argumentsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-06-28Remove unused variables and functionsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-06-28Eliminate warnings about missing prototypesDavid Oberhollenzer
This patch eliminates warnings generated by the -Wmissing-prototypes option. With this flag set, we are now forced to have prototypes for all global, exported functions, that have to be made visible to the definitions and we are forced to mark all local functions as static. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-06-28Use autoconf header detection correctly for libmissingDavid Oberhollenzer
AC_CHECK_HEADERS already makes sure our config header contains a HAVE_$FOO_H macro if a header was found. There is no need to awkwardly set our own Automake conditionals and check for it all over the place in the Automake files. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-06-28mtd-utils: tests: Fix nandbiterrs Failure CheckHarpreet Eli Sangha
After a page read, the old failure statistics are compared against the new failure statistics before the new values are actually read. Signed-off-by: Harpreet "Eli" Sangha <harpreet@nestlabs.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-06-14ubi-utils: Return error code if command line option is unknownDaniel Wagner
The tools in question will quit with an exit code 0 if the command line option was not recognized. By returning an error code a calling script has the possibility to distinguish between a real success and an invalid invocation. We need to return -1 instead of EXIT_FAILURE to be consistent with the other exit code places. Signed-off-by: Daniel Wagner <daniel.wagner@siemens.com> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-02-21ubi: tests: Speedup io_paral by using rand_r()Richard Weinberger
rand() is not thread safe, but glibc seems to use a shared state which is protected by a mutex. io_paral spawns a few threads and they call rand() more or less in parallel, which causes heavy lock contention. That makes the test extremely slow on some setups. Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: David Gstir <david@sigma-star.at> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-02-21ubi: tests: Support up to 65k NAND page sizeRichard Weinberger
io_read and io_update of mtd-utils support NAND with 4k page size only. Increase that to support up to 65k page size. Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: David Gstir <david@sigma-star.at> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-02-21ubi: tests: Replace variable-length array with malloc()David Gstir
io_read and io_update of mtd-utils use variable-length arrays for test data. Since this could result in allocating many megabytes using alloca(), switch to malloc(). Signed-off-by: David Gstir <david@sigma-star.at> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-02-20Remove README.udev from ubi-tests extra distDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2017-02-20Remove UDEV_SETTLE_HACKRichard Weinberger
UDEV_SETTLE_HACK addresses a problem which does no longer exist on Linux. These days we have devtmpfs. New devices will automatically created on the kernel side and user space has no longer to wait for udev. As udev has a hard dependency on devtmpfs we can depend on it too. People which don't use udev nor plain devtmpfs are anyways on their own. Android, I'm looking at you... Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>