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EDAC/skx_common: Make skx_dev->imc[] a flexible array

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The current skx->imc[NUM_IMC] array of memory controller instances is
sized using the macro NUM_IMC. Each time EDAC support is added for a
new CPU, NUM_IMC needs to be updated to ensure it is greater than or
equal to the number of memory controllers for the new CPU. This approach
is inconvenient and results in memory waste for older CPUs with fewer
memory controllers.

To address this, make skx->imc[] a flexible array and determine its size
from configuration data or at runtime.

Suggested-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/20250731145534.2759334-5-qiuxu.zhuo@intel.com
This commit is contained in:
Qiuxu Zhuo 2025-07-31 22:55:31 +08:00 committed by Tony Luck
parent 30b47b71fd
commit 43060ca533
2 changed files with 3 additions and 2 deletions
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3
drivers/edac/skx_common.c
View File

@ -17,6 +17,7 @@
#include <linux/acpi.h>
#include <linux/dmi.h>
#include <linux/adxl.h>
#include <linux/overflow.h>
#include <acpi/nfit.h>
#include <asm/mce.h>
#include <asm/uv/uv.h>
@ -343,7 +344,7 @@ int skx_get_all_bus_mappings(struct res_config *cfg, struct list_head **list)
if (!pdev)
break;
ndev++;
d = kzalloc(sizeof(*d), GFP_KERNEL);
d = kzalloc(struct_size(d, imc, imc_num), GFP_KERNEL);
if (!d) {
pci_dev_put(pdev);
return -ENOMEM;

2
drivers/edac/skx_common.h
View File

@ -172,7 +172,7 @@ struct skx_dev {
u8 colbits;
} dimms[NUM_DIMMS];
} chan[NUM_CHANNELS];
} imc[NUM_IMC];
} imc[];
};
struct skx_pvt {