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Subject[RFC PATCH v3 0/7] powerpc: Switch to CONFIG_THREAD_INFO_IN_TASK
Date
The purpose of this serie is to activate CONFIG_THREAD_INFO_IN_TASK which
moves the thread_info into task_struct.

Moving thread_info into task_struct has the following advantages:
- It protects thread_info from corruption in the case of stack
overflows.
- Its address is harder to determine if stack addresses are
leaked, making a number of attacks more difficult.

Changes since RFC v2:
- Removed the modification of names in asm-offsets
- Created a rule in arch/powerpc/Makefile to append the offset of current->cpu in CFLAGS
- Modified asm/smp.h to use the offset set in CFLAGS
- Squashed the renaming of THREAD_INFO to TASK_STACK in the preparation patch
- Moved the modification of current_pt_regs in the patch activating CONFIG_THREAD_INFO_IN_TASK

Changes since RFC v1:
- Removed the first patch which was modifying header inclusion order in timer
- Modified some names in asm-offsets to avoid conflicts when including asm-offsets in C files
- Modified asm/smp.h to avoid having to include linux/sched.h (using asm-offsets instead)
- Moved some changes from the activation patch to the preparation patch.

Christophe Leroy (7):
book3s/64: avoid circular header inclusion in mmu-hash.h
powerpc: Prepare for moving thread_info into task_struct
powerpc: Activate CONFIG_THREAD_INFO_IN_TASK
powerpc: regain entire stack space
powerpc: 'current_set' is now a table of task_struct pointers
powerpc/32: Remove CURRENT_THREAD_INFO and rename TI_CPU
powerpc/64: Modify CURRENT_THREAD_INFO()

arch/powerpc/Kconfig | 1 +
arch/powerpc/Makefile | 6 +++
arch/powerpc/include/asm/asm-prototypes.h | 4 +-
arch/powerpc/include/asm/book3s/64/mmu-hash.h | 2 +-
arch/powerpc/include/asm/exception-64s.h | 4 +-
arch/powerpc/include/asm/irq.h | 14 +++---
arch/powerpc/include/asm/livepatch.h | 2 +-
arch/powerpc/include/asm/processor.h | 39 ++-------------
arch/powerpc/include/asm/ptrace.h | 2 +-
arch/powerpc/include/asm/reg.h | 2 +-
arch/powerpc/include/asm/smp.h | 8 +++-
arch/powerpc/include/asm/task_size.h | 42 ++++++++++++++++
arch/powerpc/include/asm/thread_info.h | 17 +------
arch/powerpc/kernel/asm-offsets.c | 8 ++--
arch/powerpc/kernel/entry_32.S | 66 +++++++++-----------------
arch/powerpc/kernel/entry_64.S | 12 ++---
arch/powerpc/kernel/epapr_hcalls.S | 5 +-
arch/powerpc/kernel/exceptions-64e.S | 13 +----
arch/powerpc/kernel/exceptions-64s.S | 2 +-
arch/powerpc/kernel/head_32.S | 14 +++---
arch/powerpc/kernel/head_40x.S | 4 +-
arch/powerpc/kernel/head_44x.S | 8 ++--
arch/powerpc/kernel/head_64.S | 1 +
arch/powerpc/kernel/head_8xx.S | 2 +-
arch/powerpc/kernel/head_booke.h | 12 ++---
arch/powerpc/kernel/head_fsl_booke.S | 16 +++----
arch/powerpc/kernel/idle_6xx.S | 8 ++--
arch/powerpc/kernel/idle_book3e.S | 2 +-
arch/powerpc/kernel/idle_e500.S | 8 ++--
arch/powerpc/kernel/idle_power4.S | 2 +-
arch/powerpc/kernel/irq.c | 66 ++++----------------------
arch/powerpc/kernel/kgdb.c | 28 -----------
arch/powerpc/kernel/machine_kexec_64.c | 6 +--
arch/powerpc/kernel/misc_32.S | 17 +++----
arch/powerpc/kernel/process.c | 15 +++---
arch/powerpc/kernel/setup-common.c | 2 +-
arch/powerpc/kernel/setup_32.c | 15 ++----
arch/powerpc/kernel/setup_64.c | 29 ++---------
arch/powerpc/kernel/smp.c | 16 +++----
arch/powerpc/kernel/trace/ftrace_64_mprofile.S | 6 +--
arch/powerpc/kvm/book3s_hv_hmi.c | 1 +
arch/powerpc/mm/hash_low_32.S | 14 ++----
arch/powerpc/sysdev/6xx-suspend.S | 5 +-
arch/powerpc/xmon/xmon.c | 2 +-
44 files changed, 203 insertions(+), 345 deletions(-)
create mode 100644 arch/powerpc/include/asm/task_size.h

--
2.13.3

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