mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-02 20:46:41 +07:00
2d6d9fd3a5
Commit ca9b600be3 ("ACPI / PM: Make suspend_nvs_save() use
acpi_os_map_memory()") attempted to prevent the code in osl.c and nvs.c
from using different ioremap() variants by making the latter use
acpi_os_map_memory() for mapping the NVS pages. However, that also
requires acpi_os_unmap_memory() to be used for unmapping them, which
causes synchronize_rcu() to be executed many times in a row
unnecessarily and introduces substantial delays during resume on some
systems.
Instead of using acpi_os_map_memory() for mapping the NVS pages in nvs.c
introduce acpi_os_ioremap() calling ioremap_cache() and make the code in
both osl.c and nvs.c use it.
Reported-by: Jeff Chua <jeff.chua.linux@gmail.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 lines
377 B
C
17 lines
377 B
C
#ifndef _ACPI_IO_H_
|
|
#define _ACPI_IO_H_
|
|
|
|
#include <linux/io.h>
|
|
#include <acpi/acpi.h>
|
|
|
|
static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
|
|
acpi_size size)
|
|
{
|
|
return ioremap_cache(phys, size);
|
|
}
|
|
|
|
int acpi_os_map_generic_address(struct acpi_generic_address *addr);
|
|
void acpi_os_unmap_generic_address(struct acpi_generic_address *addr);
|
|
|
|
#endif
|