Re: Fw: [PATCH] trivial ppc cleanup (1/3) remove hardcoded offsetsin asm

From: Benjamin Herrenschmidt
Date: Fri Jun 18 2004 - 10:25:19 EST

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On Fri, 2004-06-18 at 00:26, Andrew Morton wrote:

> You OK with this guy's three patches?

I don't like the mixed case in the TI_*"constants, I'd rather keep them uppercase
since they are #define (except they are now generated) and that would
keep things consistent with the rest of the generated stuff.

Regarding the other bits of the patch, they seem fine after a first
look, I'll take a second look today though before I commit

Ben.

> Begin forwarded message:
>
> Date: Thu, 17 Jun 2004 20:21:23 +0200
> From: Vincent Hanquez <tab@xxxxxxxxx>
> To: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxx>, lkml <linux-kernel@xxxxxxxxxxxxxxx>
> Subject: [PATCH] trivial ppc cleanup (1/3) remove hardcoded offsets in asm
>
>
>
> Hi,
>
> remove hardcoded offset in ppc asm files like on i386 architecture
> Please apply,
>
> Signed-off-by: Vincent Hanquez <tab@xxxxxxxxx>
>
> diff -u -Naur linux-2.6.7.orig/arch/ppc/kernel/asm-offsets.c linux-2.6.7/arch/ppc/kernel/asm-offsets.c
> --- linux-2.6.7.orig/arch/ppc/kernel/asm-offsets.c 2004-06-04 10:07:19.000000000 +0200
> +++ linux-2.6.7/arch/ppc/kernel/asm-offsets.c 2004-06-04 11:57:16.000000000 +0200
> @@ -123,6 +123,13 @@
> DEFINE(CPU_SPEC_FEATURES, offsetof(struct cpu_spec, cpu_features));
> DEFINE(CPU_SPEC_SETUP, offsetof(struct cpu_spec, cpu_setup));
>
> + DEFINE(TI_task, offsetof(struct thread_info, task));
> + DEFINE(TI_exec_domain, offsetof(struct thread_info, exec_domain));
> + DEFINE(TI_flags, offsetof(struct thread_info, flags));
> + DEFINE(TI_local_flags, offsetof(struct thread_info, local_flags));
> + DEFINE(TI_cpu, offsetof(struct thread_info, cpu));
> + DEFINE(TI_preempt_count, offsetof(struct thread_info, preempt_count));
> +
> DEFINE(NUM_USER_SEGMENTS, TASK_SIZE>>28);
> return 0;
> }
> diff -u -Naur linux-2.6.7.orig/arch/ppc/kernel/entry.S linux-2.6.7/arch/ppc/kernel/entry.S
> --- linux-2.6.7.orig/arch/ppc/kernel/entry.S 2004-06-04 10:40:58.000000000 +0200
> +++ linux-2.6.7/arch/ppc/kernel/entry.S 2004-06-04 11:14:34.000000000 +0200
> @@ -199,10 +199,10 @@
> bl do_show_syscall
> #endif /* SHOW_SYSCALLS */
> rlwinm r10,r1,0,0,18 /* current_thread_info() */
> - lwz r11,TI_LOCAL_FLAGS(r10)
> + lwz r11,TI_local_flags(r10)
> rlwinm r11,r11,0,~_TIFL_FORCE_NOERROR
> - stw r11,TI_LOCAL_FLAGS(r10)
> - lwz r11,TI_FLAGS(r10)
> + stw r11,TI_local_flags(r10)
> + lwz r11,TI_flags(r10)
> andi. r11,r11,_TIF_SYSCALL_TRACE
> bne- syscall_dotrace
> syscall_dotrace_cont:
> @@ -225,7 +225,7 @@
> cmpl 0,r3,r11
> rlwinm r12,r1,0,0,18 /* current_thread_info() */
> blt+ 30f
> - lwz r11,TI_LOCAL_FLAGS(r12)
> + lwz r11,TI_local_flags(r12)
> andi. r11,r11,_TIFL_FORCE_NOERROR
> bne 30f
> neg r3,r3
> @@ -237,7 +237,7 @@
> 30: LOAD_MSR_KERNEL(r10,MSR_KERNEL) /* doesn't include MSR_EE */
> SYNC
> MTMSRD(r10)
> - lwz r9,TI_FLAGS(r12)
> + lwz r9,TI_flags(r12)
> andi. r0,r9,(_TIF_SYSCALL_TRACE|_TIF_SIGPENDING|_TIF_NEED_RESCHED)
> bne- syscall_exit_work
> syscall_exit_cont:
> @@ -311,7 +311,7 @@
> SYNC
> MTMSRD(r10) /* disable interrupts again */
> rlwinm r12,r1,0,0,18 /* current_thread_info() */
> - lwz r9,TI_FLAGS(r12)
> + lwz r9,TI_flags(r12)
> 5:
> andi. r0,r9,_TIF_NEED_RESCHED
> bne 1f
> @@ -558,7 +558,7 @@
> sigreturn_exit:
> subi r1,r3,STACK_FRAME_OVERHEAD
> rlwinm r12,r1,0,0,18 /* current_thread_info() */
> - lwz r9,TI_FLAGS(r12)
> + lwz r9,TI_flags(r12)
> andi. r0,r9,_TIF_SYSCALL_TRACE
> bnel- do_syscall_trace
> /* fall through */
> @@ -584,7 +584,7 @@
> user_exc_return: /* r10 contains MSR_KERNEL here */
> /* Check current_thread_info()->flags */
> rlwinm r9,r1,0,0,18
> - lwz r9,TI_FLAGS(r9)
> + lwz r9,TI_flags(r9)
> andi. r0,r9,(_TIF_SIGPENDING|_TIF_NEED_RESCHED)
> bne do_work
>
> @@ -603,16 +603,16 @@
> resume_kernel:
> /* check current_thread_info->preempt_count */
> rlwinm r9,r1,0,0,18
> - lwz r0,TI_PREEMPT(r9)
> + lwz r0,TI_preempt_count(r9)
> cmpwi 0,r0,0 /* if non-zero, just restore regs and return */
> bne restore
> - lwz r0,TI_FLAGS(r9)
> + lwz r0,TI_flags(r9)
> andi. r0,r0,_TIF_NEED_RESCHED
> beq+ restore
> andi. r0,r3,MSR_EE /* interrupts off? */
> beq restore /* don't schedule if so */
> 1: lis r0,PREEMPT_ACTIVE@h
> - stw r0,TI_PREEMPT(r9)
> + stw r0,TI_preempt_count(r9)
> ori r10,r10,MSR_EE
> SYNC
> MTMSRD(r10) /* hard-enable interrupts */
> @@ -622,8 +622,8 @@
> MTMSRD(r10) /* disable interrupts */
> rlwinm r9,r1,0,0,18
> li r0,0
> - stw r0,TI_PREEMPT(r9)
> - lwz r3,TI_FLAGS(r9)
> + stw r0,TI_preempt_count(r9)
> + lwz r3,TI_flags(r9)
> andi. r0,r3,_TIF_NEED_RESCHED
> bne- 1b
> #else
> @@ -901,7 +901,7 @@
> SYNC
> MTMSRD(r10) /* disable interrupts */
> rlwinm r9,r1,0,0,18
> - lwz r9,TI_FLAGS(r9)
> + lwz r9,TI_flags(r9)
> andi. r0,r9,_TIF_NEED_RESCHED
> bne- do_resched
> andi. r0,r9,_TIF_SIGPENDING
> diff -u -Naur linux-2.6.7.orig/arch/ppc/kernel/head.S linux-2.6.7/arch/ppc/kernel/head.S
> --- linux-2.6.7.orig/arch/ppc/kernel/head.S 2004-06-04 10:40:58.000000000 +0200
> +++ linux-2.6.7/arch/ppc/kernel/head.S 2004-06-04 11:56:00.000000000 +0200
> @@ -1240,7 +1240,7 @@
> tophys(r1,r1)
> lwz r1,secondary_ti@l(r1)
> tophys(r2,r1)
> - lwz r2,TI_TASK(r2)
> + lwz r2,TI_task(r2)
>
> /* stack */
> addi r1,r1,THREAD_SIZE-STACK_FRAME_OVERHEAD
> diff -u -Naur linux-2.6.7.orig/arch/ppc/kernel/idle_6xx.S linux-2.6.7/arch/ppc/kernel/idle_6xx.S
> --- linux-2.6.7.orig/arch/ppc/kernel/idle_6xx.S 2004-06-04 10:07:19.000000000 +0200
> +++ linux-2.6.7/arch/ppc/kernel/idle_6xx.S 2004-06-04 11:54:59.000000000 +0200
> @@ -94,7 +94,7 @@
>
> /* Check current_thread_info()->flags */
> rlwinm r4,r1,0,0,18
> - lwz r4,TI_FLAGS(r4)
> + lwz r4,TI_flags(r4)
> andi. r0,r4,_TIF_NEED_RESCHED
> beq 1f
> mtmsr r7 /* out of line this ? */
> @@ -191,7 +191,7 @@
>
> rlwinm r9,r1,0,0,18
> tophys(r9,r9)
> - lwz r11,TI_CPU(r9)
> + lwz r11,TI_cpu(r9)
> slwi r11,r11,2
> /* Todo make sure all these are in the same page
> * and load r22 (@ha part + CPU offset) only once
> diff -u -Naur linux-2.6.7.orig/arch/ppc/kernel/idle_power4.S linux-2.6.7/arch/ppc/kernel/idle_power4.S
> --- linux-2.6.7.orig/arch/ppc/kernel/idle_power4.S 2004-06-04 10:07:19.000000000 +0200
> +++ linux-2.6.7/arch/ppc/kernel/idle_power4.S 2004-06-04 11:54:42.000000000 +0200
> @@ -66,7 +66,7 @@
>
> /* Check current_thread_info()->flags */
> rlwinm r4,r1,0,0,18
> - lwz r4,TI_FLAGS(r4)
> + lwz r4,TI_flags(r4)
> andi. r0,r4,_TIF_NEED_RESCHED
> beq 1f
> mtmsr r7 /* out of line this ? */
> diff -u -Naur linux-2.6.7.orig/arch/ppc/kernel/misc.S linux-2.6.7/arch/ppc/kernel/misc.S
> --- linux-2.6.7.orig/arch/ppc/kernel/misc.S 2004-06-04 10:40:58.000000000 +0200
> +++ linux-2.6.7/arch/ppc/kernel/misc.S 2004-06-04 11:55:42.000000000 +0200
> @@ -233,7 +233,7 @@
>
> /* Store new HID1 image */
> rlwinm r6,r1,0,0,18
> - lwz r6,TI_CPU(r6)
> + lwz r6,TI_cpu(r6)
> slwi r6,r6,2
> addis r6,r6,nap_save_hid1@ha
> stw r4,nap_save_hid1@l(r6)
> @@ -422,7 +422,7 @@
> #else /* !(CONFIG_40x || CONFIG_44x) */
> #if defined(CONFIG_SMP)
> rlwinm r8,r1,0,0,18
> - lwz r8,TI_CPU(r8)
> + lwz r8,TI_cpu(r8)
> oris r8,r8,10
> mfmsr r10
> SYNC
> @@ -490,7 +490,7 @@
> #else /* !(CONFIG_40x || CONFIG_44x) */
> #if defined(CONFIG_SMP)
> rlwinm r8,r1,0,0,18
> - lwz r8,TI_CPU(r8)
> + lwz r8,TI_cpu(r8)
> oris r8,r8,11
> mfmsr r10
> SYNC
> diff -u -Naur linux-2.6.7.orig/include/asm-ppc/thread_info.h linux-2.6.7/include/asm-ppc/thread_info.h
> --- linux-2.6.7.orig/include/asm-ppc/thread_info.h 2004-06-04 10:07:48.000000000 +0200
> +++ linux-2.6.7/include/asm-ppc/thread_info.h 2004-06-04 11:12:21.000000000 +0200
> @@ -65,16 +65,6 @@
> */
> #define THREAD_SIZE 8192 /* 2 pages */
>
> -/*
> - * Offsets in thread_info structure, used in assembly code
> - */
> -#define TI_TASK 0
> -#define TI_EXECDOMAIN 4
> -#define TI_FLAGS 8
> -#define TI_LOCAL_FLAGS 12
> -#define TI_CPU 16
> -#define TI_PREEMPT 20
> -
> #define PREEMPT_ACTIVE 0x4000000
>
> /*
> -
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--
Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>

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Next message: Christoph Hellwig: "Re: [PATCH] PPC64 iSeries viodasd proc file"
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