aboutsummaryrefslogtreecommitdiffstats
path: root/arch/powerpc/kernel/nvram_64.c (follow)
AgeCommit message (Collapse)AuthorFilesLines
2018-12-27Merge tag 'pstore-v4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linuxLinus Torvalds1-2/+0
Pull pstore updates from Kees Cook: "Improvements and refactorings: - Improve compression handling - Refactor argument handling during initialization - Avoid needless locking for saner EFI backend handling - Add more kern-doc and improve debugging output" * tag 'pstore-v4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: pstore/ram: Avoid NULL deref in ftrace merging failure path pstore: Convert buf_lock to semaphore pstore: Fix bool initialization/comparison pstore/ram: Do not treat empty buffers as valid pstore/ram: Simplify ramoops_get_next_prz() arguments pstore: Map PSTORE_TYPE_* to strings pstore: Replace open-coded << with BIT() pstore: Improve and update some comments and status output pstore/ram: Add kern-doc for struct persistent_ram_zone pstore/ram: Report backend assignments with finer granularity pstore/ram: Standardize module name in ramoops pstore: Avoid duplicate call of persistent_ram_zap() pstore: Remove needless lock during console writes pstore: Do not use crash buffer for decompression
2018-12-04powerpc: annotate implicit fall throughsStephen Rothwell1-0/+1
There is a plan to build the kernel with -Wimplicit-fallthrough and these places in the code produced warnings, but because we build arch/powerpc with -Werror, they became errors. Fix them up. This patch produces no change in behaviour, but should be reviewed in case these are actually bugs not intentional fallthoughs. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-12-03pstore: Convert buf_lock to semaphoreKees Cook1-2/+0
Instead of running with interrupts disabled, use a semaphore. This should make it easier for backends that may need to sleep (e.g. EFI) when performing a write: |BUG: sleeping function called from invalid context at kernel/sched/completion.c:99 |in_atomic(): 1, irqs_disabled(): 1, pid: 2236, name: sig-xstate-bum |Preemption disabled at: |[<ffffffff99d60512>] pstore_dump+0x72/0x330 |CPU: 26 PID: 2236 Comm: sig-xstate-bum Tainted: G D 4.20.0-rc3 #45 |Call Trace: | dump_stack+0x4f/0x6a | ___might_sleep.cold.91+0xd3/0xe4 | __might_sleep+0x50/0x90 | wait_for_completion+0x32/0x130 | virt_efi_query_variable_info+0x14e/0x160 | efi_query_variable_store+0x51/0x1a0 | efivar_entry_set_safe+0xa3/0x1b0 | efi_pstore_write+0x109/0x140 | pstore_dump+0x11c/0x330 | kmsg_dump+0xa4/0xd0 | oops_exit+0x22/0x30 ... Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Fixes: 21b3ddd39fee ("efi: Don't use spinlocks for efi vars") Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-03powerpc/64: Fix strncpy() related build failures with GCC 8.1Christophe Leroy1-2/+2
GCC 8.1 warns about possible string truncation: arch/powerpc/kernel/nvram_64.c:1042:2: error: 'strncpy' specified bound 12 equals destination size [-Werror=stringop-truncation] strncpy(new_part->header.name, name, 12); arch/powerpc/platforms/ps3/repository.c:106:2: error: 'strncpy' output truncated before terminating nul copying 8 bytes from a string of the same length [-Werror=stringop-truncation] strncpy((char *)&n, text, 8); Fix it by using memcpy(). To make that safe we need to ensure the destination is pre-zeroed. Use kzalloc() in the nvram code and initialise the u64 to zero in the ps3 code. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> [mpe: Use kzalloc() in the nvram code, flesh out change log] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-03-20powerpc: Use sizeof(*foo) rather than sizeof(struct foo)Markus Elfring1-6/+3
It's slightly less error prone to use sizeof(*foo) rather than specifying the type. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> [mpe: Consolidate into one patch, rewrite change log] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-06-27powerpc/nvram: use memdup_userGeliang Tang1-9/+5
Use memdup_user() helper instead of open-coding to simplify the code. Signed-off-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: Kees Cook <keescook@chromium.org>
2017-04-27pstore: Fix flags to enable dumps on powerpcAnkit Kumar1-0/+1
After commit c950fd6f201a kernel registers pstore write based on flag set. Pstore write for powerpc is broken as flags(PSTORE_FLAGS_DMESG) is not set for powerpc architecture. On panic, kernel doesn't write message to /fs/pstore/dmesg*(Entry doesn't gets created at all). This patch enables pstore write for powerpc architecture by setting PSTORE_FLAGS_DMESG flag. Fixes: c950fd6f201a ("pstore: Split pstore fragile flags") Cc: stable@vger.kernel.org # v4.9+ Signed-off-by: Ankit Kumar <ankit@linux.vnet.ibm.com> Signed-off-by: Kees Cook <keescook@chromium.org>
2017-03-07pstore: Replace arguments for write() APIKees Cook1-19/+8
Similar to the pstore_info read() callback, there were too many arguments. This switches to the new struct pstore_record pointer instead. This adds "reason" and "part" to the record structure as well. Signed-off-by: Kees Cook <keescook@chromium.org>
2017-03-07pstore: Replace arguments for read() APIKees Cook1-32/+29
The argument list for the pstore_read() interface is unwieldy. This changes passes the new struct pstore_record instead. The erst backend was already doing something similar internally. Signed-off-by: Kees Cook <keescook@chromium.org>
2016-12-24Replace <asm/uaccess.h> with <linux/uaccess.h> globallyLinus Torvalds1-1/+1
This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-09-20powerpc/nvram: Fix an incorrect partition mergePan Xinhui1-3/+3
When we merge two contiguous partitions whose signatures are marked NVRAM_SIG_FREE, We need update prev's length and checksum, then write it to nvram, not cur's. So lets fix this mistake now. Also use memset instead of strncpy to set the partition's name. It's more readable if we want to fill up with duplicate chars . Fixes: fa2b4e54d41f ("powerpc/nvram: Improve partition removal") Signed-off-by: Pan Xinhui <xinhui.pan@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-09-20powerpc/nvram: Fix a memory leak in err pathPan Xinhui1-1/+1
If kmemdup fails, We need kfree *buff* first then return -ENOMEM. Otherwise there is a memory leak. Signed-off-by: Pan Xinhui <xinhui.pan@linux.vnet.ibm.com> Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-09-13powerpc/sparse: Make a bunch of things staticDaniel Axtens1-1/+1
Squash a bunch of sparse warnings by making things static. Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: Daniel Axtens <dja@axtens.net> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-06-02pstore: add lzo/lz4 compression supportGeliang Tang1-1/+3
Like zlib compression in pstore, this patch added lzo and lz4 compression support so that users can have more options and better compression ratio. The original code treats the compressed data together with the uncompressed ECC correction notice by using zlib decompress. The ECC correction notice is missing in the decompression process. The treatment also makes lzo and lz4 not working. So I treat them separately by using pstore_decompress() to treat the compressed data, and memcpy() to treat the uncompressed ECC correction notice. Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Kees Cook <keescook@chromium.org>
2016-04-11powerpc: make kernel/nvram_64.c explicitly non-modularPaul Gortmaker1-11/+1
The Makefile/Kconfig currently controlling compilation of this code is: obj-$(CONFIG_PPC64) += setup_64.o sys_ppc32.o \ signal_64.o ptrace32.o \ paca.o nvram_64.o firmware.o arch/powerpc/platforms/Kconfig.cputype:config PPC64 arch/powerpc/platforms/Kconfig.cputype: bool "64-bit kernel" ...meaning that it currently is not being built as a module by anyone. Lets remove the modular code that is essentially orphaned, so that when reading the driver there is no doubt it is builtin-only. Since module_init translates to device_initcall in the non-modular case, the init ordering remains unchanged with this commit. We don't replace module.h with init.h since the file already has that. We delete the MODULE_LICENSE tag since that information is already contained at the top of the file in the comments. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Hari Bathini <hbathini@linux.vnet.ibm.com> Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com> Cc: Andrzej Hajda <a.hajda@samsung.com> Cc: Anton Blanchard <anton@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-12-09don't open-code generic_file_llseek_size()Al Viro1-16/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-10-02powerpc/nvram: Fix function name in some errors messages.Christophe Jaillet1-7/+7
'nvram_create_os_partition' should be 'nvram_create_partition'. Use __func__ to have it right, as done elsewhere in this file. Signed-off-by: Christophe Jaillet <christophe.jaillet@wanadoo.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-10-02powerpc/nvram: Add missing kfree in error pathChristophe Jaillet1-0/+1
If 'nvram_write_header' fails, then 'new_part' should be freed, otherwise, there is a memory leak. Signed-off-by: Christophe Jaillet <christophe.jaillet@wanadoo.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-08-19powerpc/nvram: print no error when pstore backend is not nvramHari Bathini1-3/+4
Pstore only supports one backend at a time. The preferred pstore backend is set by passing the pstore.backend=<name> argument to the kernel at boot time. Currently, while trying to register with pstore, nvram throws an error message even when "pstore.backend != nvram", which is unnecessary. This patch removes the error message in case "pstore.backend != nvram". Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-08-18powerpc/nvram: use kmemdup rather than duplicating its implementationAndrzej Hajda1-2/+1
The patch was generated using fixed coccinelle semantic patch scripts/coccinelle/api/memdup.cocci [1]. [1]: http://permalink.gmane.org/gmane.linux.kernel/2014320 Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-03-23powerpc/rtas: Make timestamp related code y2038-safeHari Bathini1-3/+3
While we are here, let us make timestamp related code y2038-safe. Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-03-23powerpc/powernv: Add pstore support on powernvHari Bathini1-2/+23
This patch extends pstore, a generic interface to platform dependent persistent storage, support for powernv platform to capture certain useful information, during dying moments. Such support is already in place for pseries platform. This patch re-uses most of that code. It is a common practice to compile kernels with both CONFIG_PPC_PSERIES=y and CONFIG_PPC_POWERNV=y. The code in nvram_init_oops_partition() routine still works as intended, as the caller is platform specific code which passes the appropriate value for "rtas_partition_exists" parameter. In all other places, where CONFIG_PPC_PSERIES or CONFIG_PPC_POWERNV flag is used in this patchset, it is to reduce the kernel size in cases where this flag is not set and doesn't have any impact logic wise. Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-03-23powerpc/nvram: Move generic code for nvram and pstoreHari Bathini1-0/+656
With minor checks, we can move most of the code for nvram under pseries to a common place to be re-used by other powerpc platforms like powernv. This patch moves such common code to arch/powerpc/kernel/nvram_64.c file. Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> [mpe: Move select of ZLIB_DEFLATE to PPC64 to fix the build] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-25powerpc: Make a bunch of things staticAnton Blanchard1-1/+1
Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2013-11-25arch/powerpc/kernel: Use %12.12s instead of %12s to avoid memory overflowChen Gang1-1/+1
for tmp_part->header.name: it is "Terminating null required only for names < 12 chars". so need to limit the %.12s for it in printk additional info: %12s limit the width, not for the original string output length if name length is more than 12, it still can be fully displayed. if name length is less than 12, the ' ' will be filled before name. %.12s truly limit the original string output length (precision) Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-31powerpc/nvram: Fix endian issue when using the partition lengthCedric Le Goater1-2/+8
When reading partitions, the length has to be translated from big endian to the endian order of the host. Similarly, when writing partitions, the length needs to be in big endian order. The userspace tool 'nvram' needs a similar fix as it is reading and writing partitions through /dev/nram : http://sourceforge.net/p/powerpc-utils/mailman/message/31571277/ Signed-off-by: Cedric Le Goater <clg@fr.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-07-01powerpc/nvram64: Need return the related error code on failure occursChen Gang1-6/+14
When error occurs, need return the related error code to let upper caller know about it. ppc_md.nvram_size() can return the error code (e.g. core99_nvram_size() in 'arch/powerpc/platforms/powermac/nvram.c'). Also set ret value when only need it, so can save structions for normal cases. Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-03-18powerpc: remove cast for kmalloc/kzalloc return valueZhang Yanfei1-2/+1
remove cast for kmalloc/kzalloc return value. Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-03-04powerpc/nvram: Generalize code for OS partitions in NVRAMJim Keniston1-4/+27
Adapt the functions used to create and write to the RTAS-log partition to work with any OS-type partition. Signed-off-by: Jim Keniston <jkenisto@us.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-11-30powerpc/nvram: Handle partition names >= 12 charsJim Keniston1-2/+3
The name field in the nvram_header can be < 12 chars, null-terminated, or 12 chars without the null. Handle this safely. Signed-off-by: Jim Keniston <jkenisto@us.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-11-30powerpc/nvram: Fix NVRAM partition list setupJim Keniston1-18/+8
Simplify creation and use of the NVRAM partition list. Signed-off-by: Jim Keniston <jkenisto@us.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-11-30powerpc/nvram: Move the log partition stuff to pseriesBenjamin Herrenschmidt1-236/+18
The nvram log partition stuff currently in nvram_64.c is really pseries specific. It isn't actually used on anything else (despite the fact that we ran the code to setup the partition on anything except powermac) and the log format is specific to pseries RTAS implementation. So move it where it belongs Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-11-30powerpc/nvram: Change nvram_setup_partition() to use new helperBenjamin Herrenschmidt1-39/+32
This changes the function to use nvram_find_partition() instead of doing the lookup "by hand". It also makes some of the logic clearer and prints out more useful diagnostic information. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-11-30powerpc/nvram: Add nvram_find_partition()Benjamin Herrenschmidt1-0/+22
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-11-30powerpc/nvram: Improve partition removalBenjamin Herrenschmidt1-48/+43
Existing code is nasty, has bugs etc... rewrite the function more simply, and make it take the signature and optional name of the partitions to remove as arguments, thus making it a more generic utility. We also try to remove a log partition that we find and is too small rather than creating a duplicate. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-11-30powerpc/nvram: Shuffle code around in nvram_create_partition()Benjamin Herrenschmidt1-46/+62
This error log stuff is really pseries specific. As a first step we move the initialization of these variables to the caller of nvram_create_partition(), which is also slightly reorganized so we setup the free partition before we clear the new partition, so the chance of an error during clear leaving us with invalid headers is lessened. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-11-30powerpc/nvram: Completely clear a new partitionBenjamin Herrenschmidt1-9/+10
When creating a partition, we clear it entirely rather than just the first two words since the previous code was rather specific to the pseries log partition format. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-11-30powerpc/nvram: Ensure that the partition header/block size is rightBenjamin Herrenschmidt1-0/+2
Use BUILD_BUG_ON to ensure the structure representing a partition header have the right size. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-11-30powerpc/nvram: nvram_create_partitions() now uses bytesBenjamin Herrenschmidt1-6/+14
This converts nvram_create_partition() to use a size in bytes rather than blocks. It does the appropriate alignment internally The size passed is also the data size (ie. doesn't include the header anymore). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-11-30powerpc/nvram: More flexible nvram_create_partition()Benjamin Herrenschmidt1-18/+28
Replace nvram_create_os_partition() with a variant that takes the partition name, signature and size as arguments. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-11-30powerpc/nvram: Move things out of asm/nvram.hBenjamin Herrenschmidt1-1/+20
This moves a bunch of definitions out of asm/nvram.h to the files that use them or just outright remove completely unused stuff. We leave the partition signatures definitions, they will be useful Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-02-09arch/powerpc: Fix continuation line formatsJoe Perches1-3/+3
String constants that are continued on subsequent lines with \ are not good. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-24powerpc: Use unlocked ioctl in nvram_64Thomas Gleixner1-7/+7
The ioctl is only used for powermac systems and reads a partition number from an array which is initialized at boot time way before the nvram code is initialized. So it's safe to switch to unlocked_ioctl. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linuxppc-dev@ozlabs.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30powerpc/nvram_64: Mark init code __initThomas Gleixner1-7/+7
Mark all functions which are only called from nvram_init() __init. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linuxppc-dev@ozlabs.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30powerpc/nvram_64: Check nvram_error_log_index in nvram_clear_error_log()Thomas Gleixner1-0/+3
nvram_clear_error_log() calls ppc_md.nvram_write() even when nvram_error_log_index is -1 (invalid). The nvram_write() function does not check for a negative offset. Check nvram_error_log_index as the other nvram log functions do. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linuxppc-dev@ozlabs.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-10-30powerpc/nvram_64: Remove unused codeThomas Gleixner1-25/+0
nvram_find_partition() has no user. The call site was removed in the arch/powerpc move, but the function stayed. Remove it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linuxppc-dev@ozlabs.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2007-08-17[POWERPC] pseries: Eliminate global error_log_cnt variableLinas Vepstas1-5/+5
Eliminate the use of error_log_cnt as a global var shared across different directories. Pass it as a parameter instead. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> ---- Respin of earlier patch, with the CONFIG_PSERIES junk removed from the header file. arch/powerpc/kernel/nvram_64.c | 10 +++++----- arch/powerpc/platforms/pseries/rtasd.c | 7 ++++--- include/asm-powerpc/nvram.h | 6 ++++-- 3 files changed, 13 insertions(+), 10 deletions(-) Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-08-17[POWERPC] pseries: Fix jumbled no_logging flagLinas Vepstas1-8/+0
Get rid of the jumbled usage of the no_logging flag. Its use spans several directories, and is incorrectly/misleadingly documented. Instead, two changes: 1) nvram will accept error log as soon as its ready. 2) logging to nvram stops on the first fatal error reported. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> ---- arch/powerpc/kernel/nvram_64.c | 8 -------- arch/powerpc/platforms/pseries/rtasd.c | 14 ++++++-------- 2 files changed, 6 insertions(+), 16 deletions(-) Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-08-17[POWERPC] Remove nvram forward declarationsLinas Vepstas1-5/+0
Forward declarations serve no purpose in this file. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> ---- arch/powerpc/kernel/nvram_64.c | 5 ----- 1 file changed, 5 deletions(-) Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-02-12[PATCH] mark struct file_operations const 2Arjan van de Ven1-1/+1
Many struct file_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. [akpm@osdl.org: sparc64 fix] Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.