- 03 May, 2013 2 commits
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Heiko Carstens authored
Simplify the memory detection code a bit by removing the CHUNK_OLDMEM and CHUNK_CRASHK memory types. They are not needed. Everything that is needed is a mechanism to insert holes into the detected memory. Reviewed-by:
Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com>
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Martin Schwidefsky authored
Add a notifier for kvm to get control before a page table entry is invalidated. The notifier is only called for ptes of an address space with pgstes that have been explicitly marked to require notification. Kvm will use this to get control before prefix pages of virtual CPU are unmapped. Signed-off-by:
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- 02 May, 2013 16 commits
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Ingo Tuchscherer authored
The bus rescan process was called simultaneously on every device failure. This finally leads into race conditions (double device add/remove actions). This patch protects the rescan area by mutual exclusion and improves ap_config_timer handling Signed-off-by:
Ingo Tuchscherer <ingo.tuchscherer@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
Given that the memory block size is always larger or equal to the memory increment size there is no need for a usecount anymore. Each memory increment belongs to exactly one memory block. So get rid of the usecount. Signed-off-by:
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Heiko Carstens authored
Commit 0c2c99b1 "memory hotplug: Allow memory blocks to span multiple memory sections" introduced a weak memory_block_size_bytes() function which can be used to set the size of a memory block as seen in sysfs. Provide an s390 specific override which makes sure that each memory block has at least a size of 256MB or the increment size of of a memory increment, whatever is larger. This way we can make sure that the number of memory sysfs objects doesn't explode for very large memory configurations. Reported-by:
Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
The current memory detection loop will detect all present memory of a machine. This is true even if the user specified the "mem=" parameter on the kernel command line. This can be a problem since the memory detection may cause a fully populated host page table for the guest, even for those parts of the memory that the guest will never use afterwards. So fix this and only detect memory up to a user supplied "mem=" limit if specified. Reported-by:
Michael Johanssen <johanssn@de.ibm.com> Reviewed-by:
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Heiko Carstens authored
When in kdump mode the kernel may access only the first couple of megabytes for execution, the rest contains the dump. However the size of the bitmap used by the bootmem allocator was calculated for the whole amount of memory of the machine. For very large machines this can lead to the situation that the kdump kernel will not come up because not enough memory is available. So fix this and calculate the size of the bitmap only for the piece of memory that the kdump kernel actually uses. Call reserve_oldmem() before setup_memory_end() so that the memory_chunk array already has been updated with respect to oldmem chunks. Afterwards setup_memory_end() will ignore those chunks. Reviewed-by:
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Heiko Carstens authored
The variable real_memory_size has odd semantics and has been used in a broken way by e.g. the old kvm code. Therefore get rid of it before anybody else makes use of it. Reviewed-by:
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Nick Wang authored
The current location for mapping Virtio devices does not take into consideration of the standby memory. This causes the failure of mapping standby memory since the location for the mapping is already taken by the Virtio devices. To fix the problem, we move the location to beyond the end of standby memory. Signed-off-by:
Nick Wang <jfwang@us.ibm.com> Reviewed-by:
Christian Borntraeger <borntraeger@de.ibm.com>
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Heiko Carstens authored
The zcore device driver makes use of the global visible real_memory_size variable with its odd semantics. Since the zcore device driver already has code in place which calculates the memory size at module load time, use that code to calculate the current memory end value. One user less of the odd real_memory_size variable. Reviewed-by:
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Heiko Carstens authored
Add sanity check: verify if the passed in array resides in vmalloc space. If so print a warning and return to caller. Signed-off-by:
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Heiko Carstens authored
When disabling and enabling interrupts we must tell lockdep. So use local_irq_save()/restore() to disable and enable interrupts. The DAT disabling/enabling get handled separately now. Note: we may not call trace_hardirqs_on() with DAT disabled, since the generic code may access vmalloc'ed data structures. Reported-by:
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Heiko Carstens authored
Signed-off-by:
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Sebastian Ott authored
Use the 'ipldev' and 'condev' cio_ignore keywords to setup the command line for zfcpdump. Reviewed-by:
Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by:
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Sebastian Ott authored
Provide a 'condev' keyword to cio_ignore to (un)ignore the CCW console device. Reviewed-by:
Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by:
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Sebastian Ott authored
Provide an 'ipldev' keyword to cio_ignore to (un)ignore the CCW or FCP based boot device. Reviewed-by:
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Heiko Carstens authored
Add "fallthrough" comments so nobody wonders if a break statement is missing. Reported-by:
Joe Perches <joe@perches.com> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds authored
Pull VFS updates from Al Viro, Misc cleanups all over the place, mainly wrt /proc interfaces (switch create_proc_entry to proc_create(), get rid of the deprecated create_proc_read_entry() in favor of using proc_create_data() and seq_file etc). 7kloc removed. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (204 commits) don't bother with deferred freeing of fdtables proc: Move non-public stuff from linux/proc_fs.h to fs/proc/internal.h proc: Make the PROC_I() and PDE() macros internal to procfs proc: Supply a function to remove a proc entry by PDE take cgroup_open() and cpuset_open() to fs/proc/base.c ppc: Clean up scanlog ppc: Clean up rtas_flash driver somewhat hostap: proc: Use remove_proc_subtree() drm: proc: Use remove_proc_subtree() drm: proc: Use minor->index to label things, not PDE->name drm: Constify drm_proc_list[] zoran: Don't print proc_dir_entry data in debug reiserfs: Don't access the proc_dir_entry in r_open(), r_start() r_show() proc: Supply an accessor for getting the data from a PDE's parent airo: Use remove_proc_subtree() rtl8192u: Don't need to save device proc dir PDE rtl8187se: Use a dir under /proc/net/r8180/ proc: Add proc_mkdir_data() proc: Move some bits from linux/proc_fs.h to linux/{of.h,signal.h,tty.h} proc: Move PDE_NET() to fs/proc/proc_net.c ...
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- 01 May, 2013 22 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86/efi changes from Peter Anvin: "The bulk of these changes are cleaning up the efivars handling and breaking it up into a tree of files. There are a number of fixes as well. The entire changeset is pretty big, but most of it is code movement. Several of these commits are quite new; the history got very messed up due to a mismerge with the urgent changes for rc8 which completely broke IA64, and so Ingo requested that we rebase it to straighten it out." * 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: efi: remove "kfree(NULL)" efi: locking fix in efivar_entry_set_safe() efi, pstore: Read data from variable store before memcpy() efi, pstore: Remove entry from list when erasing efi, pstore: Initialise 'entry' before iterating efi: split efisubsystem from efivars efivarfs: Move to fs/efivarfs efivars: Move pstore code into the new EFI directory efivars: efivar_entry API efivars: Keep a private global pointer to efivars efi: move utf16 string functions to efi.h x86, efi: Make efi_memblock_x86_reserve_range more readable efivarfs: convert to use simple_open()
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James Hogan authored
Al's commit e1b5bb6d ("consolidate cond_syscall and SYSCALL_ALIAS declarations") broke the build on blackfin and metag due to the following code: #ifndef SYMBOL_NAME #ifdef CONFIG_SYMBOL_PREFIX #define SYMBOL_NAME(x) CONFIG_SYMBOL_PREFIX ## x #else #define SYMBOL_NAME(x) x #endif #endif #define __SYMBOL_NAME(x) __stringify(SYMBOL_NAME(x)) __stringify literally stringifies CONFIG_SYMBOL_PREFIX ##x, so you get lines like this in kernel/sys_ni.s: .weak CONFIG_SYMBOL_PREFIXsys_quotactl .set CONFIG_SYMBOL_PREFIXsys_quotactl,CONFIG_SYMBOL_PREFIXsys_ni_syscall The patches in Rusty's modules-next tree such as "CONFIG_SYMBOL_PREFIX: cleanup." cleans up the whole mess around symbol prefixes, so this patch just attempts to fix the build in the meantime. The intermediate definition of SYMBOL_NAME above isn't used and is incorrect when CONFIG_SYMBOL_PREFIX is defined as CONFIG_SYMBOL_PREFIX is a quoted string literal, so define __SYMBOL_NAME directly depending on CONFIG_SYMBOL_PREFIX. Signed-off-by:
James Hogan <james.hogan@imgtec.com> Mea-culpa-by:
Al Viro <viro@zeniv.linux.org.uk> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Mike Frysinger <vapier@gentoo.org> Cc: uclinux-dist-devel@blackfin.uclinux.org Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Al Viro authored
Signed-off-by: -
Al Viro authored
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David Howells authored
Move non-public declarations and definitions from linux/proc_fs.h to fs/proc/internal.h. Signed-off-by:
David Howells <dhowells@redhat.com> Signed-off-by:
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David Howells authored
Make the PROC_I() and PDE() macros internal to procfs. This means making PDE_DATA() out of line. This could be made more optimal by storing PDE()->data into inode->i_private. Also provide a __PDE_DATA() that is inline and internal to procfs. Signed-off-by:
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David Howells authored
Supply a function (proc_remove()) to remove a proc entry (and any subtree rooted there) by proc_dir_entry pointer rather than by name and (optionally) root dir entry pointer. This allows us to eliminate all remaining pde->name accesses outside of procfs. Signed-off-by:
Grant Likely <grant.likely@linaro.or> cc: linux-acpi@vger.kernel.org cc: openipmi-developer@lists.sourceforge.net cc: devicetree-discuss@lists.ozlabs.org cc: linux-pci@vger.kernel.org cc: netdev@vger.kernel.org cc: netfilter-devel@vger.kernel.org cc: alsa-devel@alsa-project.org Signed-off-by:
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Al Viro authored
Signed-off-by: -
David Howells authored
Clean up the pseries scanlog driver's use of procfs: (1) Don't need to save the proc_dir_entry pointer as we have the filename to remove with. (2) Save the scan log buffer pointer in a static variable (there is only one of it) and don't save it in the PDE (which doesn't have a destructor). Signed-off-by: -
David Howells authored
Clean up some of the problems with the rtas_flash driver: (1) It shouldn't fiddle with the internals of the procfs filesystem (altering pde->count). (2) If pid namespaces are in effect, then you can get multiple inodes connected to a single pde, thereby rendering the pde->count > 2 test useless. (3) The pde->count fudging doesn't work for forked, dup'd or cloned file descriptors, so add static mutexes and use them to wrap access to the driver through read, write and release methods. (4) The driver can only handle one device, so allocate most of the data previously attached to the pde->data as static variables instead (though allocate the validation data buffer with kmalloc). (5) We don't need to save the pde pointers as long as we have the filenames available for removal. (6) Don't try to multiplex what the update file read method does based on the filename. Instead provide separate file ops and split the function. Whilst we're at it, tabulate the procfile information and loop through it when creating or destroying them rather than manually coding each one. [Folded fixes from Vasant Hegde <hegdevasant@linux.vnet.ibm.com>] Signed-off-by: -
David Howells authored
Use remove_proc_subtree() rather than remove_proc_entry() to remove a device-specific proc directory and all its children. Signed-off-by:
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David Howells authored
Use remove_proc_subtree() rather than remove_proc_entry() to remove a minor-specific drm proc directory and all its children. Things could theoretically be improved by storing the drm_minor pointer in the minor-specific dir proc_dir_entry struct data and then scrapping the list of proc files - but that's shared with the debugfs interface where you can't do that, so I don't see an easy way of doing it. Signed-off-by:
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David Howells authored
Use minor->index to label things, not the name field from the proc_dir_entry of the /proc/dwm/<minor>/ directory. Also, use "%u" not "%d" to render the value and use a 12-byte buffer in which to render the integer, not a 16-byte buffer. The longest string an unsigned int can give you is 10 chars (4294967295) plus a NUL, so round up to 12 as the stack is likely to be 4- or 8-byte aligned. Signed-off-by:
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David Howells authored
Constify drm_proc_list[] and related pointers. Signed-off-by:
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David Howells authored
Don't print proc_dir_entry data in debug as we're soon to have no direct access to the contents of the PDE. Print what was put in there instead. Signed-off-by:
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David Howells authored
Don't access the proc_dir_entry in ReiserFS's r_open(), r_start() r_show() procfs interface functions. ReiserFS stores the ->show() method pointer in PDE->data and the super_block pointer in PDE->parent->data. This isn't changing. Currently, ReiserFS passes the PDE pointer into seq_file::private from r_open() so that r_start() and r_show() can then access it. Instead, use seq_open_private() to allocate a two-pointer struct that's passed through seq_file::private and put the ->show() method and the sb pointers in there. Signed-off-by:
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David Howells authored
Supply an accessor function for getting the private data from the parent proc_dir_entry struct of the proc_dir_entry struct associated with an inode. ReiserFS, for instance, stores the super_block pointer in the proc directory it makes for that super_block, and a pointer to the respective seq_file show function in each of the proc files in that directory. This allows a reduction in the number of file_operations structs, open functions and seq_operations structs required. The problem otherwise is that each show function requires two pieces of data but only has storage for one per PDE (and this has no release function). Signed-off-by:
Mauro Carvalho Chehab <mchehab@redhat.com> Acked-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> cc: Jerry Chuang <jerry-chuang@realtek.com> cc: Maxim Mikityanskiy <maxtram95@gmail.com> cc: YAMANE Toshiaki <yamanetoshi@gmail.com> cc: linux-wireless@vger.kernel.org cc: linux-scsi@vger.kernel.org cc: devel@driverdev.osuosl.org Signed-off-by:
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David Howells authored
Use remove_proc_subtree() to remove the airo device subdir and all its children instead of doing it manually. Signed-off-by:
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David Howells authored
Don't need to save the PDE of a directory created under /proc/net/rtl8192/ as we can use proc subtree deletion to get rid of it and all its children. Signed-off-by:
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David Howells authored
Create a dir under /proc/net/r8180/ named for the device and create that device's files under there. This means that there won't be a problem for multiple devices in the system (if such is possible) and it means we don't need to save the 'device directory' PDE any more as we can just do a proc subtree removal. Signed-off-by:
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David Howells authored
Add proc_mkdir_data() to allow procfs directories to be created that are annotated at the time of creation with private data rather than doing this post-creation. This means no access is then required to the proc_dir_entry struct to set this. Signed-off-by:
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David Howells authored
Move some bits from linux/proc_fs.h to linux/of.h, signal.h and tty.h. Also move proc_tty_init() and proc_device_tree_init() to fs/proc/internal.h as they're internal to procfs. Signed-off-by:
Grant Likely <grant.likely@secretlab.ca> cc: devicetree-discuss@lists.ozlabs.org cc: linux-arch@vger.kernel.org cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> cc: Jri Slaby <jslaby@suse.cz> Signed-off-by:
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