- May 07, 2007
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Jeff Dike authored
The build started finding calls from non-init to init functions. These are just cases of init functions not being properly marked, so this patch fixes that. Signed-off-by:
Jeff Dike <jdike@linux.intel.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Jeff Dike authored
user_util.h isn't needed any more, so delete it and remove all includes of it. Signed-off-by:
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Jeff Dike authored
Rescue the useful contents of the soon-to-be-gone user-util.h. pty.c now gets ptsname from stdlib.h like it should have always done. CATCH_EINTR is now in os.h, although perhaps all usage should be under os-Linux at some point. get_pty is also in os.h. This patch restores the old definition of ARRAY_SIZE in user.h. This file is included only in userspace files, so there will be no conflict with the kernel's new ARRAY_SIZE. The copy of the kernel's ARRAY_SIZE and associated infrastructure is now gone. Signed-off-by:
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Jeff Dike authored
This patch moves all the the symbols defined in um_arch.c, which are mostly boundaries between different parts of the UML kernel address space, to a new header, as-layout.h. There are also a few things here which aren't really related to address space layout, but which don't really have a better place to go. Signed-off-by:
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Jeff Dike authored
This patch moves the declarations of the architecture hooks from user_util.h to a new header, arch.c, and adds the necessary includes to files which need those declarations. Signed-off-by:
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Jeff Dike authored
This patch narrows the sigio interface. The boot-time SIGIO testing used to be in start_up.c, which meant that pty_output_sigio and pty_close_sigio needed to be global. By moving that code here, those can become static and the declarations moved from user_util.h. os_check_bugs is also here because it only does the SIGIO checking. If it does more, it'll probably move back to start_up.c. Signed-off-by:
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Rusty Russell authored
We can use a gcc extension to ensure that ARRAY_SIZE() is handed an array, not a pointer. This is especially important when code is changed from a fixed array to a pointer. I assume the Intel compiler doesn't support __builtin_types_compatible_p. [jdike@addtoit.com: uml: update UML definition of ARRAY_SIZE] Signed-off-by:
Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
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Jeff Dike authored
This fixes a number of problems associated with network interface hotplug. The userspace initialization function can fail in some cases, but the failure was never passed back to eth_configure, which proceeded with the configuration. This results in a zombie device that is present, but can't work. This is fixed by allowing the initialization routines to return an error, which is checked, and the configuration aborted on failure. eth_configure failed to check for many failures. Even when it did check, it didn't undo whatever initializations has already happened, so a present, but partially initialized and non-working device could result. It now checks everything that can fail, and bails out, undoing whatever had been done. The return value of eth_configure was always ignored, so it is now just void. Signed-off-by:
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Andrew Morton authored
Cc: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by:
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Jeff Dike authored
Fix a bunch of formatting violations in the drivers: return(n) -> return n whitespace fixes emacs formatting comment removal breaking if(foo) return(n) into two lines There are also a couple of errno use bugs: using errno in a printk when the failure put errno into a local variable saving errno after a printk, which can change it Signed-off-by:
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Jeff Dike authored
If a disk fails to open, i.e. its host file doesn't exist, it won't be removable because the hot-unplug code checks the existence of its gendisk. This won't exist because it is only allocated for successfully opened disks. Thus, a typo on the command line can result in a unusable and unfixable disk. This is fixed by freeing the gendisk if it's there, but not letting that affect the removal. Signed-off-by:
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Jeff Dike authored
Print out core dump limits at boot time. This is to allow core dumps to be collected if something goes very wrong and to tell if a core dump isn't going to happen because of a resource limit. Signed-off-by:
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Jeff Dike authored
Mark some tt-mode-only code as such. Also cleaned up some formatting. Signed-off-by:
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Jeff Dike authored
Move the host_info string from util.c to um_arch.c, where it is actually initialized and used. Also document its lack of locking. Signed-off-by:
Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by:
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Jeff Dike authored
Formatting fixes - style violations whitespace breakage emacs formatting comment removal Signed-off-by:
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Jeff Dike authored
Get rid of a bunch of unused stuff - cpu_feature had no users linux_prog is little-used, so its declaration is moved to the user for easy deletion when the whole file goes away a long-unused debugging aid in helper.c is gone Signed-off-by:
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- May 02, 2007
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Simon Arlott authored
The VIA C7 is a 686 (with TSC) that supports MMX, SSE and SSE2, it also has a cache line length of 64 according to http://www.digit-life.com/articles2/cpu/rmma-via-c7.html . This patch sets gcc to -march=686 and select s the correct cache shift. Signed-off-by:
Simon Arlott <simon@fire.lp0.eu> Signed-off-by:
Andi Kleen <ak@suse.de> Cc: Andi Kleen <ak@suse.de> Cc: Dave Jones <davej@codemonkey.org.uk> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by:
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- Apr 26, 2007
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Arnaldo Carvalho de Melo authored
For the places where we need a pointer to the mac header, it is still legal to touch skb->mac.raw directly if just adding to, subtracting from or setting it to another layer header. This one also converts some more cases to skb_reset_mac_header() that my regex missed as it had no spaces before nor after '=', ugh. Signed-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Arnaldo Carvalho de Melo authored
For the common, open coded 'skb->mac.raw = skb->data' operation, so that we can later turn skb->mac.raw into a offset, reducing the size of struct sk_buff in 64bit land while possibly keeping it as a pointer on 32bit. This one touches just the most simple case, next will handle the slightly more "complex" cases. Signed-off-by:
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- Apr 02, 2007
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Paolo 'Blaisorblade' Giarrusso authored
Currently we have a confused udelay implementation. * __const_udelay does not accept usecs but xloops in i386 and x86_64 * our implementation requires usecs as arg * it gets a xloops count when called by asm/arch/delay.h Bugs related to this (extremely long shutdown times) where reported by some x86_64 users, especially using Device Mapper. To hit this bug, a compile-time constant time parameter must be passed - that's why UML seems to work most times. Fix this with a simple udelay implementation. Signed-off-by:
Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by:
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- Mar 29, 2007
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Jeff Dike authored
Fix a few miscellaneous compilation problems - an assignment with mismatched types in ldt.c a missing include in mconsole.h which needs a definition of uml_pt_regs I missed removing an include of user_util.h in hostfs Signed-off-by:
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Jason Lunz authored
Permit lvm to create logical volumes without crashing UML. When device-mapper's DM_DEV_CREATE_CMD ioctl is called to create a new device, dev_create()->dm_create()->alloc_dev()-> blk_queue_bounce_limit(md->queue, BLK_BOUNCE_ANY) is called. blk_queue_bounce_limit(BLK_BOUNCE_ANY) calls init_emergency_isa_pool() if blk_max_pfn < blk_max_low_pfn. This is the case on UML, but init_emergency_isa_pool() hits BUG_ON(!isa_page_pool) because there doesn't seem to be a dma zone on UML for mempool_create() to allocate from. Most architectures seem to have max_low_pfn == max_pfn, but UML doesn't because of the uml_reserved chunk it keeps for itself. From what I can see, max_pfn and max_low_pfn don't get much use after the bootmem-allocator stops being used anyway, except that they initialize the block layer's blk_max_low_pfn/blk_max_pfn. This ensures init_emergency_isa_pool() doesn't crash uml in this situation by setting max_low_pfn == max_pfn in mem_init(). Signed-off-by:
Jason Lunz <lunz@falooley.org> Signed-off-by:
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Jeff Dike authored
As the comment immediately preceding this points out, this list is changed in irq context, so it needs to be protected with spin_lock_irqsave in process context when it is processed. Sometimes, gcc should just compile the comments and forget the code. The IRQ side of this was better, in the sense that it blocked and unblocked interrupts, but it still should have saved and restored them. Signed-off-by:
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Jeff Dike authored
Fix a NULL dereference when unplugging a device. The default value of err_msg wants to be "" in case the driver doesn't modify it. Signed-off-by:
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Jeff Dike authored
Commit 62f96cb0 introduced per-devices queues and locks, which was fine as far as it went, but left in place a global which controlled access to submitting requests to the host. This should have been made per-device as well, since it causes I/O hangs when multiple block devices are in use. This patch fixes that by replacing the global with an activity flag in the device structure in order to tell whether the queue is currently being run. Signed-off-by:
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- Mar 27, 2007
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Jeff Dike authored
This patch uses MAX_REG_NR consistently to refer to the register file size. FRAME_SIZE isn't sufficient because on x86_64, it is smaller than the ptrace register file size. MAX_REG_NR was introduced as a consistent way to get the number of registers, but wasn't used everywhere it should be. When this causes a problem, it makes PTRACE_SETREGS fail on x86_64 because of a corrupted segment register value in the known-good register file. The patch also adds a register dump at that point in case there are any future problems here. Signed-off-by:
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- Mar 14, 2007
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Al Viro authored
and no, it's not the case of "let's pull bits from underlying architecture" Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Al Viro authored
Signed-off-by:
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- Mar 08, 2007
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Jeff Dike authored
In my previous x86_64 thread fix, I forgot to initialize thread.arch.fs in arch_prctl. A process calling arch_prctl to set %fs would lose it on the next context switch. It also turns out that you can switch to a process which is in the process of exiting and which has lost its mm. In this case, it's worse than useless to try to call arch_prctl on the host process. Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
Avoid reusing userspace errno twice - it can be cleared by libc code everywhere (in particular printk() does clear it in my setup). Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
Avoid returning ENOMEM in case of a duplicate IRQ - ENOMEM was saved into err earlier. Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
Fix confusion about call context - comments and code are inconsistent and plain wrong, my fault. Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
Since both UML consoles do not use percpu variables, they may be called when the cpu is still offline, and they may be marked CON_ANYTIME (this is documented in kernel/printk.c, grep for CON_ANYTIME to find mentions of this). Works well in testing done with lock debug enabled, should be safe but is not needed for next release. This would probably help also stderr_console.c, but this is yet to test. Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
os_usr1_signal() is totally unused, os_usr1_process() is used only by TT mode. Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
Memory allocated by mcast_user_init must be freed in the matching mcast_remove. Signed-off-by:
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- Mar 06, 2007
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Jeff Dike authored
Comment the fact that sig_info is initialized early in boot, and thus doesn't need any locking. Signed-off-by:
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Jeff Dike authored
Add a debugging message in the case that mapping a stub fails. Signed-off-by:
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Jeff Dike authored
Fix a few formatting bugs in the signal code. Signed-off-by:
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- Mar 01, 2007
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Jeff Dike authored
This fixes a problem seen by a number of people running UML on newer host kernels. init would hang with an infinite segfault loop. It turns out that the host kernel was providing a AT_SYSINFO_EHDR of 0xffffe000, which faked UML into believing that the host VDSO page could be reused. However, AT_SYSINFO pointed into the middle of the address space, and was unmapped as a result. Because UML was providing AT_SYSINFO_EHDR and AT_SYSINFO to its own processes, these would branch to nowhere when trying to use the VDSO. The fix is to also check the location of AT_SYSINFO when deciding whether to use the host's VDSO. Signed-off-by:
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Allan Graves authored
Add the RAW device driver options to the UML Kconfig.char file so that you may use them in UML. Signed-off-by:
Allan <Graves<allan.graves@gmail.com> Signed-off-by:
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