linux.git/arch/arc/kernel, branch v6.9-rc2 Linux kernel source tree smp: Consolidate smp_prepare_boot_cpu() 2024-03-04T11:01:54+00:00 Thomas Gleixner tglx@linutronix.de 2024-03-04T10:12:22+00:00 712610725c48c829e42bebfc9908cd92468e2731 There is no point in having seven architectures implementing the same empty stub. Provide a weak function in the init code and remove the stubs. This also allows to utilize the function on UP which is required to sanitize the per CPU handling on X86 UP. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20240304005104.567671691@linutronix.de 
There is no point in having seven architectures implementing the same empty
stub.

Provide a weak function in the init code and remove the stubs.

This also allows to utilize the function on UP which is required to
sanitize the per CPU handling on X86 UP.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20240304005104.567671691@linutronix.de
ARC: fix smatch warning 2023-12-09T00:30:24+00:00 Vineet Gupta vgupta@kernel.org 2023-12-09T00:25:23+00:00 4eb69d00fe967699b9d93f7e74a990fe813e8d2b Reported-by: kernel test robot <lkp@intel.com> Reported-by: Dan Carpenter <error27@gmail.com> Closes: https://lore.kernel.org/r/202311280906.VAIwEAfT-lkp@intel.com/ Signed-off-by: Vineet Gupta <vgupta@kernel.org> 
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Closes: https://lore.kernel.org/r/202311280906.VAIwEAfT-lkp@intel.com/
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
ARC: fix spare error 2023-12-09T00:30:24+00:00 Vineet Gupta vgupta@kernel.org 2023-12-08T23:57:07+00:00 aca02d933f63ba8bc84258bf35f9ffaf6b664336 Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202312082320.VDN5A9hb-lkp@intel.com/ Signed-off-by: Vineet Gupta <vgupta@kernel.org> 
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202312082320.VDN5A9hb-lkp@intel.com/
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
fs: create helper file_user_path() for user displayed mapped file path 2023-10-19T09:03:15+00:00 Amir Goldstein amir73il@gmail.com 2023-10-09T15:37:11+00:00 08582d678fcf11fc86188f0b92239d3d49667d8e Overlayfs uses backing files with "fake" overlayfs f_path and "real" underlying f_inode, in order to use underlying inode aops for mapped files and to display the overlayfs path in /proc/<pid>/maps. In preparation for storing the overlayfs "fake" path instead of the underlying "real" path in struct backing_file, define a noop helper file_user_path() that returns f_path for now. Use the new helper in procfs and kernel logs whenever a path of a mapped file is displayed to users. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Link: https://lore.kernel.org/r/20231009153712.1566422-3-amir73il@gmail.com Signed-off-by: Christian Brauner <brauner@kernel.org> 
Overlayfs uses backing files with "fake" overlayfs f_path and "real"
underlying f_inode, in order to use underlying inode aops for mapped
files and to display the overlayfs path in /proc/<pid>/maps.

In preparation for storing the overlayfs "fake" path instead of the
underlying "real" path in struct backing_file, define a noop helper
file_user_path() that returns f_path for now.

Use the new helper in procfs and kernel logs whenever a path of a
mapped file is displayed to users.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Link: https://lore.kernel.org/r/20231009153712.1566422-3-amir73il@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
ARC: boot log: fix warning 2023-08-24T05:36:19+00:00 Vineet Gupta vgupta@kernel.org 2023-08-23T23:02:33+00:00 c40cad3b0aa47d6d0995637178fb6607ac3d45c1 Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202308221549.XKufWEWp-lkp@intel.com/ Signed-off-by: Vineet Gupta <vgupta@kernel.org> 
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202308221549.XKufWEWp-lkp@intel.com/
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
ARC: pt_regs: create seperate type for ecr 2023-08-18T17:30:47+00:00 Vineet Gupta vgupta@kernel.org 2020-05-22T00:44:32+00:00 58d9ceb7d9f56bd74b8e904e26511d27a4220827 Reduces duplication in each ISA specific pt_regs Tested-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202308151342.ROQ9Urvv-lkp@intel.com Signed-off-by: Vineet Gupta <vgupta@kernel.org> 
Reduces duplication in each ISA specific pt_regs

Tested-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202308151342.ROQ9Urvv-lkp@intel.com
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
ARCv2: entry: rearrange pt_regs slightly 2023-08-18T17:30:47+00:00 Vineet Gupta vgupta@kernel.org 2020-05-22T23:24:53+00:00 d4624bf6a6c9d9ff084eb2cba6d3cf6aeda9f974 Instead of r26,fp,sp,r12,r30 order as fp,r30,r12,r26,sp - keeps SP at well known position (right abive hardware autosave) - r26,r12 saved specifically for ARCv2 (and not in ARCv3) kept closer for easy ifdef'ry later Signed-off-by: Vineet Gupta <vgupta@kernel.org> 
Instead of r26,fp,sp,r12,r30 order as fp,r30,r12,r26,sp

 - keeps SP at well known position (right abive hardware autosave)
 - r26,r12 saved specifically for ARCv2 (and not in ARCv3) kept
   closer for easy ifdef'ry later

Signed-off-by: Vineet Gupta <vgupta@kernel.org>
ARC: entry: Add more common chores to EXCEPTION_PROLOGUE 2023-08-18T17:30:07+00:00 Vineet Gupta vgupta@kernel.org 2020-05-20T07:39:09+00:00 13347c10396055c4c6c38a54d10bc6ed5024fbe9 THe high level structure of most ARC exception handlers is 1. save regfile with EXCEPTION_PROLOGUE 2. setup r0: EFA (not part of pt_regs) 3. setup r1: pointer to pt_regs (SP) 4. drop down to pure kernel mode (from exception) 5. call the Linux "C" handler Remove the boiler plate code by moving #2, #3, #4 into #1. The exceptions to most exceptions are syscall Trap and Machine check which don't do some of above for various reasons, so call a newly introduced variant EXCEPTION_PROLOGUE_KEEP_AE (same as original EXCEPTION_PROLOGUE) Tested-by: Pavel Kozlov <Pavel.Kozlov@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@kernel.org> 
THe high level structure of most ARC exception handlers is
 1. save regfile with EXCEPTION_PROLOGUE
 2. setup r0: EFA (not part of pt_regs)
 3. setup r1: pointer to pt_regs (SP)
 4. drop down to pure kernel mode (from exception)
 5. call the Linux "C" handler

Remove the boiler plate code by moving #2, #3, #4 into #1.

The exceptions to most exceptions are syscall Trap and Machine check
which don't do some of above for various reasons, so call a newly
introduced variant EXCEPTION_PROLOGUE_KEEP_AE (same as original
EXCEPTION_PROLOGUE)

Tested-by: Pavel Kozlov <Pavel.Kozlov@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
ARC: entry: EV_MachineCheck dont re-read ECR 2023-08-18T03:31:59+00:00 Vineet Gupta vgupta@kernel.org 2020-05-20T07:52:45+00:00 0e93ecaeebd5d0f189d1fa50a614ac0816a8c703 Signed-off-by: Vineet Gupta <vgupta@kernel.org> 
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
ARC: entry: ARcompact EV_ProtV to use r10 directly 2023-08-18T03:31:59+00:00 Vineet Gupta vgupta@kernel.org 2020-05-20T07:47:20+00:00 6b606c8d6625aeda0b526cb687367f72bb98cd30 Signed-off-by: Vineet Gupta <vgupta@kernel.org> 
Signed-off-by: Vineet Gupta <vgupta@kernel.org>