[PATCH V3 0/8] sched: Remove unused TASK_SIZE_OF for all archs

[PATCH V3 0/8] sched: Remove unused TASK_SIZE_OF for all archs

[guoren]

From: Guo Ren <guoren@linux.alibaba.com>

This macro isn't used in Linux, now. Delete in include/linux/sched.h
and arch's include/asm. This would confuse people who are
implementing the COMPAT feature for architecture.

Changes in v3:
 - Fixup Documentation/process/submitting-patches.rst, add sender
   Signed-off-by.

Changes in v2:
 - Add Arnd's comment in main patch
 - Optimize coding convention with Christophe's advise

Guo Ren (8):
  sched: Remove unused TASK_SIZE_OF
  sched: x86: Remove unused TASK_SIZE_OF
  sched: sparc: Remove unused TASK_SIZE_OF
  sched: powerpc: Remove unused TASK_SIZE_OF
  sched: s390: Remove unused TASK_SIZE_OF
  sched: parisc: Remove unused TASK_SIZE_OF
  sched: arm64: Remove unused TASK_SIZE_OF
  sched: mips: Remove unused TASK_SIZE_OF

 arch/arm64/include/asm/processor.h      | 2 --
 arch/mips/include/asm/processor.h       | 3 ---
 arch/parisc/include/asm/processor.h     | 3 +--
 arch/powerpc/include/asm/task_size_64.h | 6 +-----
 arch/s390/include/asm/processor.h       | 3 +--
 arch/sparc/include/asm/processor_64.h   | 3 ---
 arch/x86/include/asm/page_64_types.h    | 2 --
 include/linux/sched.h                   | 4 ----
 8 files changed, 3 insertions(+), 23 deletions(-)

-- 
2.25.1

[PATCH V3 1/8] sched: Remove unused TASK_SIZE_OF

[guoren]

From: Guo Ren <guoren@linux.alibaba.com>

This macro isn't used in Linux, now. Delete in include/linux/sched.h
and arch's include/asm. This would confuse people who are
implementing the COMPAT feature for architecture.

Here is the comment by Arnd:
Looking through the git history, I see commit a06db751c321 ("pagemap:
check permissions and capabilities at open time") removing the last
user.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
---
 include/linux/sched.h | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 78c351e35fec..8e5689d06ac8 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2166,10 +2166,6 @@ static inline bool vcpu_is_preempted(int cpu)
 extern long sched_setaffinity(pid_t pid, const struct cpumask *new_mask);
 extern long sched_getaffinity(pid_t pid, struct cpumask *mask);
 
-#ifndef TASK_SIZE_OF
-#define TASK_SIZE_OF(tsk)	TASK_SIZE
-#endif
-
 #ifdef CONFIG_SMP
 /* Returns effective CPU energy utilization, as seen by the scheduler */
 unsigned long sched_cpu_util(int cpu, unsigned long max);
-- 
2.25.1

[PATCH V3 2/8] sched: x86: Remove unused TASK_SIZE_OF

[guoren]

From: Guo Ren <guoren@linux.alibaba.com>

This macro isn't used in Linux, now. Delete in
include/linux/sched.h and arch's include/asm.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/x86/include/asm/page_64_types.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/x86/include/asm/page_64_types.h b/arch/x86/include/asm/page_64_types.h
index e9e2c3ba5923..6191cf417c31 100644
--- a/arch/x86/include/asm/page_64_types.h
+++ b/arch/x86/include/asm/page_64_types.h
@@ -74,8 +74,6 @@
 					IA32_PAGE_OFFSET : DEFAULT_MAP_WINDOW)
 #define TASK_SIZE		(test_thread_flag(TIF_ADDR32) ? \
 					IA32_PAGE_OFFSET : TASK_SIZE_MAX)
-#define TASK_SIZE_OF(child)	((test_tsk_thread_flag(child, TIF_ADDR32)) ? \
-					IA32_PAGE_OFFSET : TASK_SIZE_MAX)
 
 #define STACK_TOP		TASK_SIZE_LOW
 #define STACK_TOP_MAX		TASK_SIZE_MAX
-- 
2.25.1

[PATCH V3 3/8] sched: sparc: Remove unused TASK_SIZE_OF

[guoren]

From: Guo Ren <guoren@linux.alibaba.com>

This macro isn't used in Linux, now. Delete in
include/linux/sched.h and arch's include/asm.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/sparc/include/asm/processor_64.h | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/sparc/include/asm/processor_64.h b/arch/sparc/include/asm/processor_64.h
index ae851e8fce4c..628349fc4cdd 100644
--- a/arch/sparc/include/asm/processor_64.h
+++ b/arch/sparc/include/asm/processor_64.h
@@ -27,9 +27,6 @@
 #define VPTE_SIZE	(1 << (VA_BITS - PAGE_SHIFT + 3))
 #endif
 
-#define TASK_SIZE_OF(tsk) \
-	(test_tsk_thread_flag(tsk,TIF_32BIT) ? \
-	 (1UL << 32UL) : ((unsigned long)-VPTE_SIZE))
 #define TASK_SIZE \
 	(test_thread_flag(TIF_32BIT) ? \
 	 (1UL << 32UL) : ((unsigned long)-VPTE_SIZE))
-- 
2.25.1

[PATCH V3 4/8] sched: powerpc: Remove unused TASK_SIZE_OF

[guoren]

From: Guo Ren <guoren@linux.alibaba.com>

This macro isn't used in Linux sched, now. Delete in
include/linux/sched.h and arch's include/asm.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/powerpc/include/asm/task_size_64.h | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/arch/powerpc/include/asm/task_size_64.h b/arch/powerpc/include/asm/task_size_64.h
index c993482237ed..38fdf8041d12 100644
--- a/arch/powerpc/include/asm/task_size_64.h
+++ b/arch/powerpc/include/asm/task_size_64.h
@@ -44,11 +44,7 @@
  */
 #define TASK_SIZE_USER32 (0x0000000100000000UL - (1 * PAGE_SIZE))
 
-#define TASK_SIZE_OF(tsk)						\
-	(test_tsk_thread_flag(tsk, TIF_32BIT) ? TASK_SIZE_USER32 :	\
-						TASK_SIZE_USER64)
-
-#define TASK_SIZE TASK_SIZE_OF(current)
+#define TASK_SIZE (is_32bit_task() ? TASK_SIZE_USER32 : TASK_SIZE_USER64)
 
 #define TASK_UNMAPPED_BASE_USER32 (PAGE_ALIGN(TASK_SIZE_USER32 / 4))
 #define TASK_UNMAPPED_BASE_USER64 (PAGE_ALIGN(DEFAULT_MAP_WINDOW_USER64 / 4))
-- 
2.25.1

[PATCH V3 5/8] sched: s390: Remove unused TASK_SIZE_OF

[guoren]

From: Guo Ren <guoren@linux.alibaba.com>

This macro isn't used in Linux sched, now. Delete in
include/linux/sched.h and arch's include/asm.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/s390/include/asm/processor.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index f54c152bf2bf..5581b64a4236 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -88,11 +88,10 @@ extern void __bpon(void);
  * User space process size: 2GB for 31 bit, 4TB or 8PT for 64 bit.
  */
 
-#define TASK_SIZE_OF(tsk)	(test_tsk_thread_flag(tsk, TIF_31BIT) ? \
+#define TASK_SIZE		(test_thread_flag(TIF_31BIT) ? \
 					_REGION3_SIZE : TASK_SIZE_MAX)
 #define TASK_UNMAPPED_BASE	(test_thread_flag(TIF_31BIT) ? \
 					(_REGION3_SIZE >> 1) : (_REGION2_SIZE >> 1))
-#define TASK_SIZE		TASK_SIZE_OF(current)
 #define TASK_SIZE_MAX		(-PAGE_SIZE)
 
 #define STACK_TOP		(test_thread_flag(TIF_31BIT) ? \
-- 
2.25.1

[PATCH V3 6/8] sched: parisc: Remove unused TASK_SIZE_OF

[guoren]

From: Guo Ren <guoren@linux.alibaba.com>

This macro isn't used in Linux sched, now. Delete in
include/linux/sched.h and arch's include/asm.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/parisc/include/asm/processor.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/parisc/include/asm/processor.h b/arch/parisc/include/asm/processor.h
index b669f4b9040b..d9c8dc76ee6a 100644
--- a/arch/parisc/include/asm/processor.h
+++ b/arch/parisc/include/asm/processor.h
@@ -23,8 +23,7 @@
 
 #define HAVE_ARCH_PICK_MMAP_LAYOUT
 
-#define TASK_SIZE_OF(tsk)       ((tsk)->thread.task_size)
-#define TASK_SIZE	        TASK_SIZE_OF(current)
+#define TASK_SIZE               (current->thread.task_size)
 #define TASK_UNMAPPED_BASE      (current->thread.map_base)
 
 #define DEFAULT_TASK_SIZE32	(0xFFF00000UL)
-- 
2.25.1

[PATCH V3 7/8] sched: arm64: Remove unused TASK_SIZE_OF

[guoren]

From: Guo Ren <guoren@linux.alibaba.com>

This macro isn't used in Linux sched, now. Delete in
include/linux/sched.h and arch's include/asm.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm64/include/asm/processor.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h
index 6f41b65f9962..d24dfb49237d 100644
--- a/arch/arm64/include/asm/processor.h
+++ b/arch/arm64/include/asm/processor.h
@@ -65,8 +65,6 @@
 #endif /* CONFIG_ARM64_64K_PAGES */
 #define TASK_SIZE		(test_thread_flag(TIF_32BIT) ? \
 				TASK_SIZE_32 : TASK_SIZE_64)
-#define TASK_SIZE_OF(tsk)	(test_tsk_thread_flag(tsk, TIF_32BIT) ? \
-				TASK_SIZE_32 : TASK_SIZE_64)
 #define DEFAULT_MAP_WINDOW	(test_thread_flag(TIF_32BIT) ? \
 				TASK_SIZE_32 : DEFAULT_MAP_WINDOW_64)
 #else
-- 
2.25.1

[PATCH V3 8/8] sched: mips: Remove unused TASK_SIZE_OF

[guoren]

From: Guo Ren <guoren@linux.alibaba.com>

This macro isn't used in Linux sched, now. Delete in
include/linux/sched.h and arch's include/asm.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/mips/include/asm/processor.h | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h
index 4bb24579d12e..8871fc5b0baa 100644
--- a/arch/mips/include/asm/processor.h
+++ b/arch/mips/include/asm/processor.h
@@ -61,9 +61,6 @@ extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src
 #define TASK_SIZE (test_thread_flag(TIF_32BIT_ADDR) ? TASK_SIZE32 : TASK_SIZE64)
 #define STACK_TOP_MAX	TASK_SIZE64
 
-#define TASK_SIZE_OF(tsk)						\
-	(test_tsk_thread_flag(tsk, TIF_32BIT_ADDR) ? TASK_SIZE32 : TASK_SIZE64)
-
 #define TASK_IS_32BIT_ADDR test_thread_flag(TIF_32BIT_ADDR)
 
 #endif
-- 
2.25.1

Re: [PATCH V3 5/8] sched: s390: Remove unused TASK_SIZE_OF

[Heiko Carstens]

On Tue, Dec 28, 2021 at 02:47:26PM +0800, guoren@kernel.org wrote:
> From: Guo Ren <guoren@linux.alibaba.com>
> 
> This macro isn't used in Linux sched, now. Delete in
> include/linux/sched.h and arch's include/asm.
> 
> Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
> Signed-off-by: Guo Ren <guoren@kernel.org>
> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  arch/s390/include/asm/processor.h | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)

Applied, thanks!

Re: (subset) [PATCH V3 0/8] sched: Remove unused TASK_SIZE_OF for all archs

[Michael Ellerman]

On Tue, 28 Dec 2021 14:47:21 +0800, guoren@kernel.org wrote:
> From: Guo Ren <guoren@linux.alibaba.com>
> 
> This macro isn't used in Linux, now. Delete in include/linux/sched.h
> and arch's include/asm. This would confuse people who are
> implementing the COMPAT feature for architecture.
> 
> Changes in v3:
>  - Fixup Documentation/process/submitting-patches.rst, add sender
>    Signed-off-by.
> 
> [...]

Applied to powerpc/next.

[4/8] sched: powerpc: Remove unused TASK_SIZE_OF
      https://git.kernel.org/powerpc/c/08035a67f35a8765cac39bb12e56c61ee880227a

cheers