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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: a4520a4e-5809-4ec5-23ad-08d7629c5308 X-MS-Exchange-CrossTenant-originalarrivaltime: 06 Nov 2019 09:33:04.5815 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 70e1fb47-1155-421d-87fc-2e58f638b6e0 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: AcUKPm766T1yE0EXTcoSifbIoOn0JkTnl+Pls2zZPPmjmwPEVHDZPHs2J9D0lLufJWjxz4x4D4Wo5o3TiSVuwg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR18MB3165 X-OriginatorOrg: marvell.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2019-11-06_02:2019-11-06,2019-11-06 signatures=0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The EDAC_DIMM_OFF() macro takes 5 arguments to get the DIMM's index. This can be much simplified. Store the index in struct dimm_info to avoid its calculation and remove the EDAC_DIMM_OFF() macro. The index can be directly used. Another advantage is that edac_mc_alloc() could be used even if the exact size of the layers is unknown. Only the number of DIMMs would be needed. Signed-off-by: Robert Richter --- drivers/edac/edac_mc.c | 14 ++++------- drivers/edac/edac_mc_sysfs.c | 20 ++++------------ include/linux/edac.h | 45 ++++-------------------------------- 3 files changed, 13 insertions(+), 66 deletions(-) diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c index e6fd079783bd..72088d49b03b 100644 --- a/drivers/edac/edac_mc.c +++ b/drivers/edac/edac_mc.c @@ -314,10 +314,10 @@ struct mem_ctl_info *edac_mc_alloc(unsigned int mc_nu= m, struct dimm_info *dimm; u32 *ce_per_layer[EDAC_MAX_LAYERS], *ue_per_layer[EDAC_MAX_LAYERS]; unsigned int pos[EDAC_MAX_LAYERS]; - unsigned int size, tot_dimms =3D 1, count =3D 1; + unsigned int idx, size, tot_dimms =3D 1, count =3D 1; unsigned int tot_csrows =3D 1, tot_channels =3D 1, tot_errcount =3D 0; void *pvt, *p, *ptr =3D NULL; - int i, j, row, chn, n, len, off; + int i, j, row, chn, n, len; bool per_rank =3D false; =20 BUG_ON(n_layers > EDAC_MAX_LAYERS || n_layers =3D=3D 0); @@ -425,19 +425,15 @@ struct mem_ctl_info *edac_mc_alloc(unsigned int mc_nu= m, memset(&pos, 0, sizeof(pos)); row =3D 0; chn =3D 0; - for (i =3D 0; i < tot_dimms; i++) { + for (idx =3D 0; idx < tot_dimms; idx++) { chan =3D mci->csrows[row]->channels[chn]; - off =3D EDAC_DIMM_OFF(layer, n_layers, pos[0], pos[1], pos[2]); - if (off < 0 || off >=3D tot_dimms) { - edac_mc_printk(mci, KERN_ERR, "EDAC core bug: EDAC_DIMM_OFF is trying t= o do an illegal data access\n"); - goto error; - } =20 dimm =3D kzalloc(sizeof(**mci->dimms), GFP_KERNEL); if (!dimm) goto error; - mci->dimms[off] =3D dimm; + mci->dimms[idx] =3D dimm; dimm->mci =3D mci; + dimm->idx =3D idx; =20 /* * Copy DIMM location and initialize it. diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c index 32d016f1ecd1..91e4c8f155af 100644 --- a/drivers/edac/edac_mc_sysfs.c +++ b/drivers/edac/edac_mc_sysfs.c @@ -557,14 +557,8 @@ static ssize_t dimmdev_ce_count_show(struct device *de= v, { struct dimm_info *dimm =3D to_dimm(dev); u32 count; - int off; - - off =3D EDAC_DIMM_OFF(dimm->mci->layers, - dimm->mci->n_layers, - dimm->location[0], - dimm->location[1], - dimm->location[2]); - count =3D dimm->mci->ce_per_layer[dimm->mci->n_layers-1][off]; + + count =3D dimm->mci->ce_per_layer[dimm->mci->n_layers-1][dimm->idx]; return sprintf(data, "%u\n", count); } =20 @@ -574,14 +568,8 @@ static ssize_t dimmdev_ue_count_show(struct device *de= v, { struct dimm_info *dimm =3D to_dimm(dev); u32 count; - int off; - - off =3D EDAC_DIMM_OFF(dimm->mci->layers, - dimm->mci->n_layers, - dimm->location[0], - dimm->location[1], - dimm->location[2]); - count =3D dimm->mci->ue_per_layer[dimm->mci->n_layers-1][off]; + + count =3D dimm->mci->ue_per_layer[dimm->mci->n_layers-1][dimm->idx]; return sprintf(data, "%u\n", count); } =20 diff --git a/include/linux/edac.h b/include/linux/edac.h index 696bfb684d92..79c5564ee314 100644 --- a/include/linux/edac.h +++ b/include/linux/edac.h @@ -362,47 +362,6 @@ struct edac_mc_layer { */ #define EDAC_MAX_LAYERS 3 =20 -/** - * EDAC_DIMM_OFF - Macro responsible to get a pointer offset inside a poin= ter - * array for the element given by [layer0,layer1,layer2] - * position - * - * @layers: a struct edac_mc_layer array, describing how many elements - * were allocated for each layer - * @nlayers: Number of layers at the @layers array - * @layer0: layer0 position - * @layer1: layer1 position. Unused if n_layers < 2 - * @layer2: layer2 position. Unused if n_layers < 3 - * - * For 1 layer, this macro returns "var[layer0] - var"; - * - * For 2 layers, this macro is similar to allocate a bi-dimensional array - * and to return "var[layer0][layer1] - var"; - * - * For 3 layers, this macro is similar to allocate a tri-dimensional array - * and to return "var[layer0][layer1][layer2] - var". - * - * A loop could be used here to make it more generic, but, as we only have - * 3 layers, this is a little faster. - * - * By design, layers can never be 0 or more than 3. If that ever happens, - * a NULL is returned, causing an OOPS during the memory allocation routin= e, - * with would point to the developer that he's doing something wrong. - */ -#define EDAC_DIMM_OFF(layers, nlayers, layer0, layer1, layer2) ({ \ - int __i; \ - if ((nlayers) =3D=3D 1) \ - __i =3D layer0; \ - else if ((nlayers) =3D=3D 2) \ - __i =3D (layer1) + ((layers[1]).size * (layer0)); \ - else if ((nlayers) =3D=3D 3) \ - __i =3D (layer2) + ((layers[2]).size * ((layer1) + \ - ((layers[1]).size * (layer0)))); \ - else \ - __i =3D -EINVAL; \ - __i; \ -}) - struct dimm_info { struct device dev; =20 @@ -412,6 +371,7 @@ struct dimm_info { unsigned int location[EDAC_MAX_LAYERS]; =20 struct mem_ctl_info *mci; /* the parent */ + unsigned int idx; /* index within the parent dimm array */ =20 u32 grain; /* granularity of reported error in bytes */ enum dev_type dtype; /* memory device type */ @@ -654,6 +614,9 @@ edac_get_dimm_by_index(struct mem_ctl_info *mci, int in= dex) if (index < 0 || index >=3D mci->tot_dimms) return NULL; =20 + if (WARN_ON_ONCE(mci->dimms[index]->idx !=3D index)) + return NULL; + return mci->dimms[index]; } =20 --=20 2.20.1