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Message-ID: <BANLkTi=sDZpRPXOtM4GESezPWOe9j77ThA@mail.gmail.com>
Date: Mon, 11 Apr 2011 23:18:27 +0800
From: wanlong gao <wanlong.gao@...il.com>
To: steiner@....com
Cc: linux-kernel@...r.kernel.org, Wanlong Gao <wanlong.gao@...il.com>
Subject: Re: [PATCH] misc:sgi-gru:removed the unused arch definition
On 4/11/11, wanlong.gao@...il.com <wanlong.gao@...il.com> wrote:
> From: Wanlong Gao <wanlong.gao@...il.com>
>
> Because SGI_GRU depends on X86_UV, and X86_UV
> depends on X86_64.
> So the code under the "#ifdef CONFIG_IA64" in
> sgi-gru will always unused .
>
> Signed-off-by: Wanlong Gao <wanlong.gao@...il.com>
> ---
> drivers/misc/sgi-gru/gru.h | 4 +-
> drivers/misc/sgi-gru/gru_instructions.h | 12 +-----
> drivers/misc/sgi-gru/grufile.c | 72
> -------------------------------
> drivers/misc/sgi-gru/gruhandles.c | 6 ---
> drivers/misc/sgi-gru/grumain.c | 4 --
> 5 files changed, 2 insertions(+), 96 deletions(-)
>
> diff --git a/drivers/misc/sgi-gru/gru.h b/drivers/misc/sgi-gru/gru.h
> index 3ad76cd..9650249
> --- a/drivers/misc/sgi-gru/gru.h
> +++ b/drivers/misc/sgi-gru/gru.h
> @@ -30,9 +30,7 @@
> /*
> * Size used to map GRU GSeg
> */
> -#if defined(CONFIG_IA64)
> -#define GRU_GSEG_PAGESIZE (256 * 1024UL)
> -#elif defined(CONFIG_X86_64)
> +#ifdef CONFIG_X86_64
> #define GRU_GSEG_PAGESIZE (256 * 1024UL) /* ZZZ 2MB ??? */
> #else
> #error "Unsupported architecture"
> diff --git a/drivers/misc/sgi-gru/gru_instructions.h
> b/drivers/misc/sgi-gru/gru_instructions.h
> index d95587c..bf44419
> --- a/drivers/misc/sgi-gru/gru_instructions.h
> +++ b/drivers/misc/sgi-gru/gru_instructions.h
> @@ -29,17 +29,7 @@ extern void gru_wait_abort_proc(void *cb);
> * Architecture dependent functions
> */
>
> -#if defined(CONFIG_IA64)
> -#include <linux/compiler.h>
> -#include <asm/intrinsics.h>
> -#define __flush_cache(p) ia64_fc((unsigned long)p)
> -/* Use volatile on IA64 to ensure ordering via st4.rel */
> -#define gru_ordered_store_ulong(p, v) \
> - do { \
> - barrier(); \
> - *((volatile unsigned long *)(p)) = v; /* force st.rel */ \
> - } while (0)
> -#elif defined(CONFIG_X86_64)
> +#ifdef CONFIG_X86_64
> #define __flush_cache(p) clflush(p)
> #define gru_ordered_store_ulong(p, v) \
> do { \
> diff --git a/drivers/misc/sgi-gru/grufile.c b/drivers/misc/sgi-gru/grufile.c
> index 20e4e93..544f05e
> --- a/drivers/misc/sgi-gru/grufile.c
> +++ b/drivers/misc/sgi-gru/grufile.c
> @@ -344,72 +344,6 @@ static unsigned long gru_chiplet_cpu_to_mmr(int
> chiplet, int cpu, int *corep)
> return mmr;
> }
>
> -#ifdef CONFIG_IA64
> -
> -static int gru_irq_count[GRU_CHIPLETS_PER_BLADE];
> -
> -static void gru_noop(unsigned int irq)
> -{
> -}
> -
> -static struct irq_chip gru_chip[GRU_CHIPLETS_PER_BLADE] = {
> - [0 ... GRU_CHIPLETS_PER_BLADE - 1] {
> - .mask = gru_noop,
> - .unmask = gru_noop,
> - .ack = gru_noop
> - }
> -};
> -
> -static int gru_chiplet_setup_tlb_irq(int chiplet, char *irq_name,
> - irq_handler_t irq_handler, int cpu, int blade)
> -{
> - unsigned long mmr;
> - int irq = IRQ_GRU + chiplet;
> - int ret, core;
> -
> - mmr = gru_chiplet_cpu_to_mmr(chiplet, cpu, &core);
> - if (mmr == 0)
> - return 0;
> -
> - if (gru_irq_count[chiplet] == 0) {
> - gru_chip[chiplet].name = irq_name;
> - ret = irq_set_chip(irq, &gru_chip[chiplet]);
> - if (ret) {
> - printk(KERN_ERR "%s: set_irq_chip failed, errno=%d\n",
> - GRU_DRIVER_ID_STR, -ret);
> - return ret;
> - }
> -
> - ret = request_irq(irq, irq_handler, 0, irq_name, NULL);
> - if (ret) {
> - printk(KERN_ERR "%s: request_irq failed, errno=%d\n",
> - GRU_DRIVER_ID_STR, -ret);
> - return ret;
> - }
> - }
> - gru_irq_count[chiplet]++;
> -
> - return 0;
> -}
> -
> -static void gru_chiplet_teardown_tlb_irq(int chiplet, int cpu, int blade)
> -{
> - unsigned long mmr;
> - int core, irq = IRQ_GRU + chiplet;
> -
> - if (gru_irq_count[chiplet] == 0)
> - return;
> -
> - mmr = gru_chiplet_cpu_to_mmr(chiplet, cpu, &core);
> - if (mmr == 0)
> - return;
> -
> - if (--gru_irq_count[chiplet] == 0)
> - free_irq(irq, NULL);
> -}
> -
> -#elif defined CONFIG_X86_64
> -
> static int gru_chiplet_setup_tlb_irq(int chiplet, char *irq_name,
> irq_handler_t irq_handler, int cpu, int blade)
> {
> @@ -454,8 +388,6 @@ static void gru_chiplet_teardown_tlb_irq(int chiplet,
> int cpu, int blade)
> }
> }
>
> -#endif
> -
> static void gru_teardown_tlb_irqs(void)
> {
> int blade;
> @@ -521,12 +453,8 @@ static int __init gru_init(void)
> if (!is_uv_system())
> return 0;
>
> -#if defined CONFIG_IA64
> - gru_start_paddr = 0xd000000000UL; /* ZZZZZZZZZZZZZZZZZZZ fixme */
> -#else
> gru_start_paddr = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR) &
> 0x7fffffffffffUL;
> -#endif
> gru_start_vaddr = __va(gru_start_paddr);
> gru_end_paddr = gru_start_paddr + GRU_MAX_BLADES * GRU_SIZE;
> printk(KERN_INFO "GRU space: 0x%lx - 0x%lx\n",
> diff --git a/drivers/misc/sgi-gru/gruhandles.c
> b/drivers/misc/sgi-gru/gruhandles.c
> index 2f30bad..e17a9e6
> --- a/drivers/misc/sgi-gru/gruhandles.c
> +++ b/drivers/misc/sgi-gru/gruhandles.c
> @@ -24,15 +24,9 @@
> #include "grutables.h"
>
> /* 10 sec */
> -#ifdef CONFIG_IA64
> -#include <asm/processor.h>
> -#define GRU_OPERATION_TIMEOUT (((cycles_t) local_cpu_data->itc_freq)*10)
> -#define CLKS2NSEC(c) ((c) *1000000000 / local_cpu_data->itc_freq)
> -#else
> #include <asm/tsc.h>
> #define GRU_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000)
> #define CLKS2NSEC(c) ((c) * 1000000 / tsc_khz)
> -#endif
>
> /* Extract the status field from a kernel handle */
> #define GET_MSEG_HANDLE_STATUS(h) (((*(unsigned long *)(h)) >> 16) & 3)
> diff --git a/drivers/misc/sgi-gru/grumain.c b/drivers/misc/sgi-gru/grumain.c
> index f8538bb..f8b65e6
> --- a/drivers/misc/sgi-gru/grumain.c
> +++ b/drivers/misc/sgi-gru/grumain.c
> @@ -53,16 +53,12 @@ struct device *grudev = &gru_device;
> */
> int gru_cpu_fault_map_id(void)
> {
> -#ifdef CONFIG_IA64
> - return uv_blade_processor_id() % GRU_NUM_TFM;
> -#else
> int cpu = smp_processor_id();
> int id, core;
>
> core = uv_cpu_core_number(cpu);
> id = core + UV_MAX_INT_CORES * uv_cpu_socket_number(cpu);
> return id;
> -#endif
> }
>
> /*--------- ASID Management -------------------------------------------
> --
> 1.7.3
>
Does this work do the right thing ? I'm not sure .
Thanks
>
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