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Simple PCIe FMC carrier SPEC
Commit 0f6e6a0e authored by Mathis MARION's avatar Mathis MARION Committed by Federico Vaga
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Kernel 5.7 compatibility for kallsyms_lookup_name 

`kallsyms_lookup_name` is no longer available from
headers since kernel 5.7.
This compatibility fix is described here:
https://github.com/xcellerator/linux_kernel_hacking/issues/3Signed-off-by: 's avatarGwenhael GOAVEC <gwenhael.goavec@femto-st.fr>
Signed-off-by: 's avatarMathis MARION <mathis.marion@grenoble-inp.org>
parent fb536cf8
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software/kernel/spec-compat.c
View file @ 0f6e6a0e
......@@ -13,6 +13,15 @@
#if KERNEL_VERSION(5, 7, 0) <= LINUX_VERSION_CODE
#define KPROBE_LOOKUP
#include <linux/kprobes.h>
typedef unsigned long (*kallsyms_lookup_name_t)(const char *name);
static struct kprobe kp = {
.symbol_name = "kallsyms_lookup_name"
};
#endif
#if KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE && !defined(CONFIG_FPGA_MGR_BACKPORT)
struct fpga_manager *__fpga_mgr_get(struct device *dev)
{
......@@ -60,6 +69,13 @@ struct fpga_manager *fpga_mgr_get(struct device *dev)
struct class *fpga_mgr_class;
struct device *mgr_dev;
#ifdef KPROBE_LOOKUP
kallsyms_lookup_name_t kallsyms_lookup_name;
register_kprobe(&kp);
kallsyms_lookup_name = (kallsyms_lookup_name_t) kp.addr;
unregister_kprobe(&kp);
#endif
fpga_mgr_class = (struct class *) kallsyms_lookup_name(FPGA_CLASS);
mgr_dev = class_find_device(fpga_mgr_class, NULL, dev,
fpga_mgr_dev_match);
......@@ -156,6 +172,13 @@ int compat_gpiod_add_lookup_table(struct gpiod_lookup_table *table)
{
void (*gpiod_add_lookup_table_p)(struct gpiod_lookup_table *table);
#ifdef KPROBE_LOOKUP
kallsyms_lookup_name_t kallsyms_lookup_name;
register_kprobe(&kp);
kallsyms_lookup_name = (kallsyms_lookup_name_t) kp.addr;
unregister_kprobe(&kp);
#endif
gpiod_add_lookup_table_p = (void *) kallsyms_lookup_name("gpiod_add_lookup_table");
if (gpiod_add_lookup_table_p)
......@@ -168,6 +191,13 @@ int compat_gpiod_add_lookup_table(struct gpiod_lookup_table *table)
#if KERNEL_VERSION(4, 3, 0) > LINUX_VERSION_CODE
void gpiod_remove_lookup_table(struct gpiod_lookup_table *table)
{
#ifdef KPROBE_LOOKUP
kallsyms_lookup_name_t kallsyms_lookup_name;
register_kprobe(&kp);
kallsyms_lookup_name = (kallsyms_lookup_name_t) kp.addr;
unregister_kprobe(&kp);
#endif
struct mutex *gpio_lookup_lock_p = (void *) kallsyms_lookup_name("gpio_lookup_lock");
mutex_lock(gpio_lookup_lock_p);
......
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