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path: root/include/acpi/acpi_io.h
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#ifndef _ACPI_IO_H_
#define _ACPI_IO_H_

#include <linux/io.h>

#include <asm/acpi.h>

#ifndef acpi_os_ioremap
static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
					    acpi_size size)
{
       return ioremap_cache(phys, size);
}
#endif

extern bool acpi_permanent_mmap;

void __iomem *__ref
acpi_os_map_iomem(acpi_physical_address phys, acpi_size size);
void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size);
void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size);

int acpi_os_map_generic_address(struct acpi_generic_address *addr);
void acpi_os_unmap_generic_address(struct acpi_generic_address *addr);

#endif
4a9c00980552fe508c'>patch) treece6547ef2987fbb289fa28f03536328a42781651 /include/net/llc_sap.h parent191e885a2e130e639bb0c8ee350d7047294f2ce6 (diff)
Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()
Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") added the proper mb(), but removed the test "prev_write_sz < pending_sz" when making the signal decision. As a result, the guest can signal the host unnecessarily, and then the host can throttle the guest because the host thinks the guest is buggy or malicious; finally the user running stress test can perceive intermittent freeze of the guest. This patch brings back the test, and properly handles the in-place consumption APIs used by NetVSC (see get_next_pkt_raw(), put_pkt_raw() and commit_rd_index()). Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") Signed-off-by: Dexuan Cui <decui@microsoft.com> Reported-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Tested-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: <stable@vger.kernel.org> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/net/llc_sap.h')