diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/edac/edac_device.c | 27 | ||||
| -rw-r--r-- | drivers/edac/edac_mc.c | 44 | ||||
| -rw-r--r-- | drivers/edac/edac_module.h | 2 | ||||
| -rw-r--r-- | drivers/edac/edac_pci.c | 6 |
4 files changed, 48 insertions, 31 deletions
diff --git a/drivers/edac/edac_device.c b/drivers/edac/edac_device.c index 4b154593343a..cb397d9437d1 100644 --- a/drivers/edac/edac_device.c +++ b/drivers/edac/edac_device.c @@ -79,7 +79,7 @@ struct edac_device_ctl_info *edac_device_alloc_ctl_info( unsigned total_size; unsigned count; unsigned instance, block, attr; - void *pvt; + void *pvt, *p; int err; debugf4("%s() instances=%d blocks=%d\n", @@ -92,35 +92,30 @@ struct edac_device_ctl_info *edac_device_alloc_ctl_info( * to be at least as stringent as what the compiler would * provide if we could simply hardcode everything into a single struct. */ - dev_ctl = (struct edac_device_ctl_info *)NULL; + p = NULL; + dev_ctl = edac_align_ptr(&p, sizeof(*dev_ctl), 1); /* Calc the 'end' offset past end of ONE ctl_info structure * which will become the start of the 'instance' array */ - dev_inst = edac_align_ptr(&dev_ctl[1], sizeof(*dev_inst)); + dev_inst = edac_align_ptr(&p, sizeof(*dev_inst), nr_instances); /* Calc the 'end' offset past the instance array within the ctl_info * which will become the start of the block array */ - dev_blk = edac_align_ptr(&dev_inst[nr_instances], sizeof(*dev_blk)); + count = nr_instances * nr_blocks; + dev_blk = edac_align_ptr(&p, sizeof(*dev_blk), count); /* Calc the 'end' offset past the dev_blk array * which will become the start of the attrib array, if any. */ - count = nr_instances * nr_blocks; - dev_attrib = edac_align_ptr(&dev_blk[count], sizeof(*dev_attrib)); - - /* Check for case of when an attribute array is specified */ - if (nr_attrib > 0) { - /* calc how many nr_attrib we need */ + /* calc how many nr_attrib we need */ + if (nr_attrib > 0) count *= nr_attrib; + dev_attrib = edac_align_ptr(&p, sizeof(*dev_attrib), count); - /* Calc the 'end' offset past the attributes array */ - pvt = edac_align_ptr(&dev_attrib[count], sz_private); - } else { - /* no attribute array specificed */ - pvt = edac_align_ptr(dev_attrib, sz_private); - } + /* Calc the 'end' offset past the attributes array */ + pvt = edac_align_ptr(&p, sz_private, 1); /* 'pvt' now points to where the private data area is. * At this point 'pvt' (like dev_inst,dev_blk and dev_attrib) diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c index 072aa81b4a70..ff8c0020649c 100644 --- a/drivers/edac/edac_mc.c +++ b/drivers/edac/edac_mc.c @@ -101,18 +101,37 @@ const char *edac_mem_types[] = { }; EXPORT_SYMBOL_GPL(edac_mem_types); -/* 'ptr' points to a possibly unaligned item X such that sizeof(X) is 'size'. - * Adjust 'ptr' so that its alignment is at least as stringent as what the - * compiler would provide for X and return the aligned result. +/** + * edac_align_ptr - Prepares the pointer offsets for a single-shot allocation + * @p: pointer to a pointer with the memory offset to be used. At + * return, this will be incremented to point to the next offset + * @size: Size of the data structure to be reserved + * @n_elems: Number of elements that should be reserved * * If 'size' is a constant, the compiler will optimize this whole function - * down to either a no-op or the addition of a constant to the value of 'ptr'. + * down to either a no-op or the addition of a constant to the value of '*p'. + * + * The 'p' pointer is absolutely needed to keep the proper advancing + * further in memory to the proper offsets when allocating the struct along + * with its embedded structs, as edac_device_alloc_ctl_info() does it + * above, for example. + * + * At return, the pointer 'p' will be incremented to be used on a next call + * to this function. */ -void *edac_align_ptr(void *ptr, unsigned size) +void *edac_align_ptr(void **p, unsigned size, int n_elems) { unsigned align, r; + void *ptr = *p; - /* Here we assume that the alignment of a "long long" is the most + *p += size * n_elems; + + /* + * 'p' can possibly be an unaligned item X such that sizeof(X) is + * 'size'. Adjust 'p' so that its alignment is at least as + * stringent as what the compiler would provide for X and return + * the aligned result. + * Here we assume that the alignment of a "long long" is the most * stringent alignment that the compiler will ever provide by default. * As far as I know, this is a reasonable assumption. */ @@ -132,6 +151,8 @@ void *edac_align_ptr(void *ptr, unsigned size) if (r == 0) return (char *)ptr; + *p += align - r; + return (void *)(((unsigned long)ptr) + align - r); } @@ -154,6 +175,7 @@ void *edac_align_ptr(void *ptr, unsigned size) struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows, unsigned nr_chans, int edac_index) { + void *ptr = NULL; struct mem_ctl_info *mci; struct csrow_info *csi, *csrow; struct rank_info *chi, *chp, *chan; @@ -168,11 +190,11 @@ struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows, * stringent as what the compiler would provide if we could simply * hardcode everything into a single struct. */ - mci = (struct mem_ctl_info *)0; - csi = edac_align_ptr(&mci[1], sizeof(*csi)); - chi = edac_align_ptr(&csi[nr_csrows], sizeof(*chi)); - dimm = edac_align_ptr(&chi[nr_chans * nr_csrows], sizeof(*dimm)); - pvt = edac_align_ptr(&dimm[nr_chans * nr_csrows], sz_pvt); + mci = edac_align_ptr(&ptr, sizeof(*mci), 1); + csi = edac_align_ptr(&ptr, sizeof(*csi), nr_csrows); + chi = edac_align_ptr(&ptr, sizeof(*chi), nr_csrows * nr_chans); + dimm = edac_align_ptr(&ptr, sizeof(*dimm), nr_csrows * nr_chans); + pvt = edac_align_ptr(&ptr, sz_pvt, 1); size = ((unsigned long)pvt) + sz_pvt; mci = kzalloc(size, GFP_KERNEL); diff --git a/drivers/edac/edac_module.h b/drivers/edac/edac_module.h index 00f81b47a51f..0ea7d14cb930 100644 --- a/drivers/edac/edac_module.h +++ b/drivers/edac/edac_module.h @@ -50,7 +50,7 @@ extern void edac_device_reset_delay_period(struct edac_device_ctl_info *edac_dev, unsigned long value); extern void edac_mc_reset_delay_period(int value); -extern void *edac_align_ptr(void *ptr, unsigned size); +extern void *edac_align_ptr(void **p, unsigned size, int n_elems); /* * EDAC PCI functions diff --git a/drivers/edac/edac_pci.c b/drivers/edac/edac_pci.c index 63af1c5673d1..f1ac86649886 100644 --- a/drivers/edac/edac_pci.c +++ b/drivers/edac/edac_pci.c @@ -42,13 +42,13 @@ struct edac_pci_ctl_info *edac_pci_alloc_ctl_info(unsigned int sz_pvt, const char *edac_pci_name) { struct edac_pci_ctl_info *pci; - void *pvt; + void *p = NULL, *pvt; unsigned int size; debugf1("%s()\n", __func__); - pci = (struct edac_pci_ctl_info *)0; - pvt = edac_align_ptr(&pci[1], sz_pvt); + pci = edac_align_ptr(&p, sizeof(*pci), 1); + pvt = edac_align_ptr(&p, 1, sz_pvt); size = ((unsigned long)pvt) + sz_pvt; /* Alloc the needed control struct memory */ |