mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 08:16:49 +07:00
6496edfce9
functions, prompted by their mis-use in staging. With these function removed, all cpu functions should only iterate to nr_cpu_ids, so we finally only allocate that many bits when cpumasks are allocated offstack. Thanks, Rusty. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJVNPMuAAoJENkgDmzRrbjx7ZIP/j65e6xs1jEyXR3WOYSdTU1x bMo6JcII6O1oEZLgyKXgx9KiBg6uIIDta1NG/H/XIe354dwfHVsHvj5HHHQR5Xof iRrjLOaHj4XglI3hvsk0eEEl3/OBBLgyo9bUwDvMF1fmr/9tW4caMs3Op6n7Evzm YIvoAyeJ0A8BfEtOU5lXhcVIGmnHtSw0x6mdGXpXIBmWYQPCtdQP868s4lnl44w0 bSNpAYdzEqg64Ph3SK0prgWPrn5+5EiaAhV7HZzENZ5+o0DAdIXWq/W7uHyCWPKH 536cJDojec+nSUQkPYngngGprxrKO02aBcMw/3JGJ0tdCDj8yw3XAyVAFzz4hmMb Lkmyv4QHHIILLvJ4ZRH5KHWCjjVBg41LNCs2H3HnoxFACdm0lZYKHsUAh2ucBVtU Wb/eHmLxOG43UIkpX4yrhy3SfE1ZdnOVzEzOzPXtr51t8ojqk+bLFe/hJ6EkzrQX X+90qHfBq+PMJlAnc3zdXHjxoJrL6KPWVwVvFrNeibgEKtVvy/BiwZkS6QceC1Ea TatOYA5r6awFVHHQCooN1DGAxN5Juvu2SmdnTUA9ymsCNDghj1YUoAKRNP81u8Sa pe3hco/63iCuPna+vlwNDU6SgsaMk9m0p+1n1BiDIfVJIkWYCNeG+u2gQkzbDKlQ AJuKKQv1QuZiF0ylZ0wq =VAgA -----END PGP SIGNATURE----- Merge tag 'cpumask-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux Pull final removal of deprecated cpus_* cpumask functions from Rusty Russell: "This is the final removal (after several years!) of the obsolete cpus_* functions, prompted by their mis-use in staging. With these function removed, all cpu functions should only iterate to nr_cpu_ids, so we finally only allocate that many bits when cpumasks are allocated offstack" * tag 'cpumask-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (25 commits) cpumask: remove __first_cpu / __next_cpu cpumask: resurrect CPU_MASK_CPU0 linux/cpumask.h: add typechecking to cpumask_test_cpu cpumask: only allocate nr_cpumask_bits. Fix weird uses of num_online_cpus(). cpumask: remove deprecated functions. mips: fix obsolete cpumask_of_cpu usage. x86: fix more deprecated cpu function usage. ia64: remove deprecated cpus_ usage. powerpc: fix deprecated CPU_MASK_CPU0 usage. CPU_MASK_ALL/CPU_MASK_NONE: remove from deprecated region. staging/lustre/o2iblnd: Don't use cpus_weight staging/lustre/libcfs: replace deprecated cpus_ calls with cpumask_ staging/lustre/ptlrpc: Do not use deprecated cpus_* functions blackfin: fix up obsolete cpu function usage. parisc: fix up obsolete cpu function usage. tile: fix up obsolete cpu function usage. arm64: fix up obsolete cpu function usage. mips: fix up obsolete cpu function usage. x86: fix up obsolete cpu function usage. ...
203 lines
5.0 KiB
C
203 lines
5.0 KiB
C
#include <linux/slab.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/export.h>
|
|
#include <linux/bootmem.h>
|
|
|
|
/**
|
|
* cpumask_next_and - get the next cpu in *src1p & *src2p
|
|
* @n: the cpu prior to the place to search (ie. return will be > @n)
|
|
* @src1p: the first cpumask pointer
|
|
* @src2p: the second cpumask pointer
|
|
*
|
|
* Returns >= nr_cpu_ids if no further cpus set in both.
|
|
*/
|
|
int cpumask_next_and(int n, const struct cpumask *src1p,
|
|
const struct cpumask *src2p)
|
|
{
|
|
struct cpumask tmp;
|
|
|
|
if (cpumask_and(&tmp, src1p, src2p))
|
|
return cpumask_next(n, &tmp);
|
|
return nr_cpu_ids;
|
|
}
|
|
EXPORT_SYMBOL(cpumask_next_and);
|
|
|
|
/**
|
|
* cpumask_any_but - return a "random" in a cpumask, but not this one.
|
|
* @mask: the cpumask to search
|
|
* @cpu: the cpu to ignore.
|
|
*
|
|
* Often used to find any cpu but smp_processor_id() in a mask.
|
|
* Returns >= nr_cpu_ids if no cpus set.
|
|
*/
|
|
int cpumask_any_but(const struct cpumask *mask, unsigned int cpu)
|
|
{
|
|
unsigned int i;
|
|
|
|
cpumask_check(cpu);
|
|
for_each_cpu(i, mask)
|
|
if (i != cpu)
|
|
break;
|
|
return i;
|
|
}
|
|
|
|
/* These are not inline because of header tangles. */
|
|
#ifdef CONFIG_CPUMASK_OFFSTACK
|
|
/**
|
|
* alloc_cpumask_var_node - allocate a struct cpumask on a given node
|
|
* @mask: pointer to cpumask_var_t where the cpumask is returned
|
|
* @flags: GFP_ flags
|
|
*
|
|
* Only defined when CONFIG_CPUMASK_OFFSTACK=y, otherwise is
|
|
* a nop returning a constant 1 (in <linux/cpumask.h>)
|
|
* Returns TRUE if memory allocation succeeded, FALSE otherwise.
|
|
*
|
|
* In addition, mask will be NULL if this fails. Note that gcc is
|
|
* usually smart enough to know that mask can never be NULL if
|
|
* CONFIG_CPUMASK_OFFSTACK=n, so does code elimination in that case
|
|
* too.
|
|
*/
|
|
bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node)
|
|
{
|
|
*mask = kmalloc_node(cpumask_size(), flags, node);
|
|
|
|
#ifdef CONFIG_DEBUG_PER_CPU_MAPS
|
|
if (!*mask) {
|
|
printk(KERN_ERR "=> alloc_cpumask_var: failed!\n");
|
|
dump_stack();
|
|
}
|
|
#endif
|
|
|
|
return *mask != NULL;
|
|
}
|
|
EXPORT_SYMBOL(alloc_cpumask_var_node);
|
|
|
|
bool zalloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node)
|
|
{
|
|
return alloc_cpumask_var_node(mask, flags | __GFP_ZERO, node);
|
|
}
|
|
EXPORT_SYMBOL(zalloc_cpumask_var_node);
|
|
|
|
/**
|
|
* alloc_cpumask_var - allocate a struct cpumask
|
|
* @mask: pointer to cpumask_var_t where the cpumask is returned
|
|
* @flags: GFP_ flags
|
|
*
|
|
* Only defined when CONFIG_CPUMASK_OFFSTACK=y, otherwise is
|
|
* a nop returning a constant 1 (in <linux/cpumask.h>).
|
|
*
|
|
* See alloc_cpumask_var_node.
|
|
*/
|
|
bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags)
|
|
{
|
|
return alloc_cpumask_var_node(mask, flags, NUMA_NO_NODE);
|
|
}
|
|
EXPORT_SYMBOL(alloc_cpumask_var);
|
|
|
|
bool zalloc_cpumask_var(cpumask_var_t *mask, gfp_t flags)
|
|
{
|
|
return alloc_cpumask_var(mask, flags | __GFP_ZERO);
|
|
}
|
|
EXPORT_SYMBOL(zalloc_cpumask_var);
|
|
|
|
/**
|
|
* alloc_bootmem_cpumask_var - allocate a struct cpumask from the bootmem arena.
|
|
* @mask: pointer to cpumask_var_t where the cpumask is returned
|
|
*
|
|
* Only defined when CONFIG_CPUMASK_OFFSTACK=y, otherwise is
|
|
* a nop (in <linux/cpumask.h>).
|
|
* Either returns an allocated (zero-filled) cpumask, or causes the
|
|
* system to panic.
|
|
*/
|
|
void __init alloc_bootmem_cpumask_var(cpumask_var_t *mask)
|
|
{
|
|
*mask = memblock_virt_alloc(cpumask_size(), 0);
|
|
}
|
|
|
|
/**
|
|
* free_cpumask_var - frees memory allocated for a struct cpumask.
|
|
* @mask: cpumask to free
|
|
*
|
|
* This is safe on a NULL mask.
|
|
*/
|
|
void free_cpumask_var(cpumask_var_t mask)
|
|
{
|
|
kfree(mask);
|
|
}
|
|
EXPORT_SYMBOL(free_cpumask_var);
|
|
|
|
/**
|
|
* free_bootmem_cpumask_var - frees result of alloc_bootmem_cpumask_var
|
|
* @mask: cpumask to free
|
|
*/
|
|
void __init free_bootmem_cpumask_var(cpumask_var_t mask)
|
|
{
|
|
memblock_free_early(__pa(mask), cpumask_size());
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* cpumask_set_cpu_local_first - set i'th cpu with local numa cpu's first
|
|
*
|
|
* @i: index number
|
|
* @numa_node: local numa_node
|
|
* @dstp: cpumask with the relevant cpu bit set according to the policy
|
|
*
|
|
* This function sets the cpumask according to a numa aware policy.
|
|
* cpumask could be used as an affinity hint for the IRQ related to a
|
|
* queue. When the policy is to spread queues across cores - local cores
|
|
* first.
|
|
*
|
|
* Returns 0 on success, -ENOMEM for no memory, and -EAGAIN when failed to set
|
|
* the cpu bit and need to re-call the function.
|
|
*/
|
|
int cpumask_set_cpu_local_first(int i, int numa_node, cpumask_t *dstp)
|
|
{
|
|
cpumask_var_t mask;
|
|
int cpu;
|
|
int ret = 0;
|
|
|
|
if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
|
|
return -ENOMEM;
|
|
|
|
i %= num_online_cpus();
|
|
|
|
if (numa_node == -1 || !cpumask_of_node(numa_node)) {
|
|
/* Use all online cpu's for non numa aware system */
|
|
cpumask_copy(mask, cpu_online_mask);
|
|
} else {
|
|
int n;
|
|
|
|
cpumask_and(mask,
|
|
cpumask_of_node(numa_node), cpu_online_mask);
|
|
|
|
n = cpumask_weight(mask);
|
|
if (i >= n) {
|
|
i -= n;
|
|
|
|
/* If index > number of local cpu's, mask out local
|
|
* cpu's
|
|
*/
|
|
cpumask_andnot(mask, cpu_online_mask, mask);
|
|
}
|
|
}
|
|
|
|
for_each_cpu(cpu, mask) {
|
|
if (--i < 0)
|
|
goto out;
|
|
}
|
|
|
|
ret = -EAGAIN;
|
|
|
|
out:
|
|
free_cpumask_var(mask);
|
|
|
|
if (!ret)
|
|
cpumask_set_cpu(cpu, dstp);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(cpumask_set_cpu_local_first);
|