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| author | Julien Thierry <julien.thierry@arm.com> | 2019-02-22 09:32:50 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2019-02-26 16:57:59 +0000 |
| commit | 4caf8758b60b6f7f9773fd1d265cb5a7cf935c97 (patch) | |
| tree | 94cfb17194e4b36aef489e9564cf7c8d63fb742d /arch/arm64 | |
| parent | 47224e51ab778e918257b96c1a1b3735e4b8c15d (diff) | |
| download | linux-0-day-4caf8758b60b6f7f9773fd1d265cb5a7cf935c97.tar.gz linux-0-day-4caf8758b60b6f7f9773fd1d265cb5a7cf935c97.tar.xz | |
arm64: Rename get_thread_info()
The assembly macro get_thread_info() actually returns a task_struct and is
analogous to the current/get_current macro/function.
While it could be argued that thread_info sits at the start of
task_struct and the intention could have been to return a thread_info,
instances of loads from/stores to the address obtained from
get_thread_info() use offsets that are generated with
offsetof(struct task_struct, [...]).
Rename get_thread_info() to state it returns a task_struct.
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/include/asm/asm-uaccess.h | 2 | ||||
| -rw-r--r-- | arch/arm64/include/asm/assembler.h | 6 | ||||
| -rw-r--r-- | arch/arm64/kernel/entry.S | 4 |
3 files changed, 6 insertions, 6 deletions
diff --git a/arch/arm64/include/asm/asm-uaccess.h b/arch/arm64/include/asm/asm-uaccess.h index 4128bec033f65..f74909ba29bdd 100644 --- a/arch/arm64/include/asm/asm-uaccess.h +++ b/arch/arm64/include/asm/asm-uaccess.h @@ -24,7 +24,7 @@ .endm .macro __uaccess_ttbr0_enable, tmp1, tmp2 - get_thread_info \tmp1 + get_current_task \tmp1 ldr \tmp1, [\tmp1, #TSK_TI_TTBR0] // load saved TTBR0_EL1 mrs \tmp2, ttbr1_el1 extr \tmp2, \tmp2, \tmp1, #48 diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h index 7acf2436b5781..9c5c876a9ff2c 100644 --- a/arch/arm64/include/asm/assembler.h +++ b/arch/arm64/include/asm/assembler.h @@ -528,9 +528,9 @@ USER(\label, ic ivau, \tmp2) // invalidate I line PoU .endm /* - * Return the current thread_info. + * Return the current task_struct. */ - .macro get_thread_info, rd + .macro get_current_task, rd mrs \rd, sp_el0 .endm @@ -713,7 +713,7 @@ USER(\label, ic ivau, \tmp2) // invalidate I line PoU .macro if_will_cond_yield_neon #ifdef CONFIG_PREEMPT - get_thread_info x0 + get_current_task x0 ldr x0, [x0, #TSK_TI_PREEMPT] sub x0, x0, #PREEMPT_DISABLE_OFFSET cbz x0, .Lyield_\@ diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 6bf7e12f9a2b2..c50a7a75f2e0f 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -185,7 +185,7 @@ alternative_cb_end .else add x21, sp, #S_FRAME_SIZE - get_thread_info tsk + get_current_task tsk /* Save the task's original addr_limit and set USER_DS */ ldr x20, [tsk, #TSK_TI_ADDR_LIMIT] str x20, [sp, #S_ORIG_ADDR_LIMIT] @@ -1104,7 +1104,7 @@ ENTRY(ret_from_fork) cbz x19, 1f // not a kernel thread mov x0, x20 blr x19 -1: get_thread_info tsk +1: get_current_task tsk b ret_to_user ENDPROC(ret_from_fork) NOKPROBE(ret_from_fork) |