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authorJulien Thierry <julien.thierry@arm.com>2019-02-22 09:32:50 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2019-02-26 16:57:59 +0000
commit4caf8758b60b6f7f9773fd1d265cb5a7cf935c97 (patch)
tree94cfb17194e4b36aef489e9564cf7c8d63fb742d
parentarm64: Remove documentation about TIF_USEDFPU (diff)
downloadlinux-dev-4caf8758b60b6f7f9773fd1d265cb5a7cf935c97.tar.xz
linux-dev-4caf8758b60b6f7f9773fd1d265cb5a7cf935c97.zip
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 '')
-rw-r--r--arch/arm64/include/asm/asm-uaccess.h2
-rw-r--r--arch/arm64/include/asm/assembler.h6
-rw-r--r--arch/arm64/kernel/entry.S4
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 4128bec033f6..f74909ba29bd 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 7acf2436b578..9c5c876a9ff2 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 6bf7e12f9a2b..c50a7a75f2e0 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)