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Date: Sat, 17 Nov 2012 15:50:40 +0100
From: Borislav Petkov <bp@...en8.de>
To: Daniel J Blueman <daniel@...ascale-asia.com>
Cc: Ingo Molnar <mingo@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>,
H Peter Anvin <hpa@...or.com>,
Steffen Persvold <sp@...ascale.com>, x86@...nel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3, v2] AMD64 EDAC: Cleanup type usage to be consistent
On Mon, Nov 05, 2012 at 02:05:26PM +0800, Daniel J Blueman wrote:
> As the Northbridge IDs are at most 16-bits, use the same type
> consistently and cleanup some indexes to use smaller types.
>
> v2: Drop unneeded changes and changes Boris will cleanup later
>
> Signed-off-by: Daniel J Blueman <daniel@...ascale-asia.com>
> ---
> arch/x86/include/asm/amd_nb.h | 2 +-
> arch/x86/include/asm/processor.h | 2 +-
> arch/x86/kernel/cpu/amd.c | 4 ++--
> drivers/edac/amd64_edac.c | 14 +++++++-------
> drivers/edac/amd64_edac.h | 6 +++---
> 5 files changed, 14 insertions(+), 14 deletions(-)
>
> diff --git a/arch/x86/include/asm/amd_nb.h b/arch/x86/include/asm/amd_nb.h
> index 9f5532a..b0815a0 100644
> --- a/arch/x86/include/asm/amd_nb.h
> +++ b/arch/x86/include/asm/amd_nb.h
> @@ -76,7 +76,7 @@ static inline bool amd_nb_has_feature(unsigned feature)
> return ((amd_northbridges.flags & feature) == feature);
> }
>
> -static inline struct amd_northbridge *node_to_amd_nb(int node)
> +static inline struct amd_northbridge *node_to_amd_nb(u16 node)
> {
> return (node < amd_northbridges.num) ? &amd_northbridges.nb[node] : NULL;
> }
> diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
> index ad1fc85..eb3ba58 100644
> --- a/arch/x86/include/asm/processor.h
> +++ b/arch/x86/include/asm/processor.h
> @@ -934,7 +934,7 @@ extern void start_thread(struct pt_regs *regs, unsigned long new_ip,
> extern int get_tsc_mode(unsigned long adr);
> extern int set_tsc_mode(unsigned int val);
>
> -extern int amd_get_nb_id(int cpu);
> +extern u16 amd_get_nb_id(int cpu);
This is correct - this function actually returns cpu_llc_id which is
u16. However, other places in the kernel save the result in an int which
is not absolutely kosher but I guess this is ok since sizeof(int) >=
sizeof(u16) on x86.
Someone should probably go and fix the rest of the places where
amd_get_nb_id is being used when someone is bored :-).
> struct aperfmperf {
> u64 aperf, mperf;
> diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
> index f7e98a2..52cab1f 100644
> --- a/arch/x86/kernel/cpu/amd.c
> +++ b/arch/x86/kernel/cpu/amd.c
> @@ -364,9 +364,9 @@ static void __cpuinit amd_detect_cmp(struct cpuinfo_x86 *c)
> #endif
> }
>
> -int amd_get_nb_id(int cpu)
> +u16 amd_get_nb_id(int cpu)
> {
> - int id = 0;
> + u16 id = 0;
> #ifdef CONFIG_SMP
> id = per_cpu(cpu_llc_id, cpu);
> #endif
> diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
> index 5dfe452..a3e297a 100644
> --- a/drivers/edac/amd64_edac.c
> +++ b/drivers/edac/amd64_edac.c
> @@ -239,7 +239,7 @@ static int amd64_get_scrub_rate(struct mem_ctl_info *mci)
> * DRAM base/limit associated with node_id
> */
> static bool amd64_base_limit_match(struct amd64_pvt *pvt, u64 sys_addr,
> - unsigned nid)
> + u8 nid)
> {
> u64 addr;
>
> @@ -265,7 +265,7 @@ static struct mem_ctl_info *find_mc_by_sys_addr(struct mem_ctl_info *mci,
> u64 sys_addr)
> {
> struct amd64_pvt *pvt;
> - unsigned node_id;
> + u8 node_id;
> u32 intlv_en, bits;
>
> /*
> @@ -1349,7 +1349,7 @@ static u8 f1x_determine_channel(struct amd64_pvt *pvt, u64 sys_addr,
> }
>
> /* Convert the sys_addr to the normalized DCT address */
> -static u64 f1x_get_norm_dct_addr(struct amd64_pvt *pvt, unsigned range,
> +static u64 f1x_get_norm_dct_addr(struct amd64_pvt *pvt, u8 range,
> u64 sys_addr, bool hi_rng,
> u32 dct_sel_base_addr)
> {
> @@ -1400,7 +1400,7 @@ static u64 f1x_get_norm_dct_addr(struct amd64_pvt *pvt, unsigned range,
> * checks if the csrow passed in is marked as SPARED, if so returns the new
> * spare row
> */
> -static int f10_process_possible_spare(struct amd64_pvt *pvt, u8 dct, int csrow)
> +static int f10_process_possible_spare(struct amd64_pvt *pvt, u16 dct, int csrow)
> {
> int tmp_cs;
>
> @@ -1425,7 +1425,7 @@ static int f10_process_possible_spare(struct amd64_pvt *pvt, u8 dct, int csrow)
> * -EINVAL: NOT FOUND
> * 0..csrow = Chip-Select Row
> */
> -static int f1x_lookup_addr_in_dct(u64 in_addr, u32 nid, u8 dct)
> +static int f1x_lookup_addr_in_dct(u64 in_addr, u16 nid, u8 dct)
This nid comes from dram_dst_node and it is
#define dram_dst_node(pvt, i) ((u8)(pvt->ranges[i].lim.lo & 0x7))
so nid is only three bits wide. It actually should be u8.
> {
> struct mem_ctl_info *mci;
> struct amd64_pvt *pvt;
> @@ -2257,7 +2257,7 @@ static int init_csrows(struct mem_ctl_info *mci)
> }
>
> /* get all cores on this DCT */
> -static void get_cpus_on_this_dct_cpumask(struct cpumask *mask, unsigned nid)
> +static void get_cpus_on_this_dct_cpumask(struct cpumask *mask, u16 nid)
> {
> int cpu;
>
> @@ -2267,7 +2267,7 @@ static void get_cpus_on_this_dct_cpumask(struct cpumask *mask, unsigned nid)
> }
>
> /* check MCG_CTL on all the cpus on this node */
> -static bool amd64_nb_mce_bank_enabled_on_node(unsigned nid)
> +static bool amd64_nb_mce_bank_enabled_on_node(u16 nid)
> {
> cpumask_var_t mask;
> int cpu, nbe;
> diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h
> index 90cae61..a2ea6a4 100644
> --- a/drivers/edac/amd64_edac.h
> +++ b/drivers/edac/amd64_edac.h
> @@ -332,7 +332,7 @@ struct amd64_pvt {
> /* pci_device handles which we utilize */
> struct pci_dev *F1, *F2, *F3;
>
> - unsigned mc_node_id; /* MC index of this MC node */
> + u16 mc_node_id; /* MC index of this MC node */
> int ext_model; /* extended model value of this node */
> int channel_count;
>
> @@ -368,7 +368,7 @@ struct amd64_pvt {
> struct error_injection injection;
> };
>
> -static inline u64 get_dram_base(struct amd64_pvt *pvt, unsigned i)
> +static inline u64 get_dram_base(struct amd64_pvt *pvt, u8 i)
> {
> u64 addr = ((u64)pvt->ranges[i].base.lo & 0xffff0000) << 8;
>
> @@ -378,7 +378,7 @@ static inline u64 get_dram_base(struct amd64_pvt *pvt, unsigned i)
> return (((u64)pvt->ranges[i].base.hi & 0x000000ff) << 40) | addr;
> }
>
> -static inline u64 get_dram_limit(struct amd64_pvt *pvt, unsigned i)
> +static inline u64 get_dram_limit(struct amd64_pvt *pvt, u8 i)
> {
> u64 lim = (((u64)pvt->ranges[i].lim.lo & 0xffff0000) << 8) | 0x00ffffff;
>
> --
> 1.7.10.4
>
>
--
Regards/Gruss,
Boris.
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