Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 46bff16..a23c393 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* This file implements the perfmon-2 subsystem which is used
* to program the IA-64 Performance Monitoring Unit (PMU).
@@ -38,6 +39,7 @@
#include <linux/smp.h>
#include <linux/pagemap.h>
#include <linux/mount.h>
+#include <linux/pseudo_fs.h>
#include <linux/bitops.h>
#include <linux/capability.h>
#include <linux/rcupdate.h>
@@ -583,17 +585,6 @@
if (task != current) put_task_struct(task);
}
-static inline void
-pfm_reserve_page(unsigned long a)
-{
- SetPageReserved(vmalloc_to_page((void *)a));
-}
-static inline void
-pfm_unreserve_page(unsigned long a)
-{
- ClearPageReserved(vmalloc_to_page((void*)a));
-}
-
static inline unsigned long
pfm_protect_ctx_ctxsw(pfm_context_t *x)
{
@@ -610,17 +601,19 @@
/* forward declaration */
static const struct dentry_operations pfmfs_dentry_operations;
-static struct dentry *
-pfmfs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data)
+static int pfmfs_init_fs_context(struct fs_context *fc)
{
- return mount_pseudo(fs_type, "pfm:", NULL, &pfmfs_dentry_operations,
- PFMFS_MAGIC);
+ struct pseudo_fs_context *ctx = init_pseudo(fc, PFMFS_MAGIC);
+ if (!ctx)
+ return -ENOMEM;
+ ctx->dops = &pfmfs_dentry_operations;
+ return 0;
}
static struct file_system_type pfm_fs_type = {
- .name = "pfmfs",
- .mount = pfmfs_mount,
- .kill_sb = kill_anon_super,
+ .name = "pfmfs",
+ .init_fs_context = pfmfs_init_fs_context,
+ .kill_sb = kill_anon_super,
};
MODULE_ALIAS_FS("pfmfs");
@@ -816,44 +809,6 @@
DPRINT(("ctx=%p msgq reset\n", ctx));
}
-static void *
-pfm_rvmalloc(unsigned long size)
-{
- void *mem;
- unsigned long addr;
-
- size = PAGE_ALIGN(size);
- mem = vzalloc(size);
- if (mem) {
- //printk("perfmon: CPU%d pfm_rvmalloc(%ld)=%p\n", smp_processor_id(), size, mem);
- addr = (unsigned long)mem;
- while (size > 0) {
- pfm_reserve_page(addr);
- addr+=PAGE_SIZE;
- size-=PAGE_SIZE;
- }
- }
- return mem;
-}
-
-static void
-pfm_rvfree(void *mem, unsigned long size)
-{
- unsigned long addr;
-
- if (mem) {
- DPRINT(("freeing physical buffer @%p size=%lu\n", mem, size));
- addr = (unsigned long) mem;
- while ((long) size > 0) {
- pfm_unreserve_page(addr);
- addr+=PAGE_SIZE;
- size-=PAGE_SIZE;
- }
- vfree(mem);
- }
- return;
-}
-
static pfm_context_t *
pfm_context_alloc(int ctx_flags)
{
@@ -1498,7 +1453,7 @@
/*
* free the buffer
*/
- pfm_rvfree(ctx->ctx_smpl_hdr, ctx->ctx_smpl_size);
+ vfree(ctx->ctx_smpl_hdr);
ctx->ctx_smpl_hdr = NULL;
ctx->ctx_smpl_size = 0UL;
@@ -2137,7 +2092,7 @@
* All memory free operations (especially for vmalloc'ed memory)
* MUST be done with interrupts ENABLED.
*/
- if (smpl_buf_addr) pfm_rvfree(smpl_buf_addr, smpl_buf_size);
+ vfree(smpl_buf_addr);
/*
* return the memory used by the context
@@ -2266,10 +2221,8 @@
/*
* We do the easy to undo allocations first.
- *
- * pfm_rvmalloc(), clears the buffer, so there is no leak
*/
- smpl_buf = pfm_rvmalloc(size);
+ smpl_buf = vzalloc(size);
if (smpl_buf == NULL) {
DPRINT(("Can't allocate sampling buffer\n"));
return -ENOMEM;
@@ -2346,7 +2299,7 @@
error:
vm_area_free(vma);
error_kmem:
- pfm_rvfree(smpl_buf, size);
+ vfree(smpl_buf);
return -ENOMEM;
}
@@ -6440,11 +6393,7 @@
}
/* save the current system wide pmu states */
- ret = on_each_cpu(pfm_alt_save_pmu_state, NULL, 1);
- if (ret) {
- DPRINT(("on_each_cpu() failed: %d\n", ret));
- goto cleanup_reserve;
- }
+ on_each_cpu(pfm_alt_save_pmu_state, NULL, 1);
/* officially change to the alternate interrupt handler */
pfm_alt_intr_handler = hdl;
@@ -6471,7 +6420,6 @@
pfm_remove_alt_pmu_interrupt(pfm_intr_handler_desc_t *hdl)
{
int i;
- int ret;
if (hdl == NULL) return -EINVAL;
@@ -6485,10 +6433,7 @@
pfm_alt_intr_handler = NULL;
- ret = on_each_cpu(pfm_alt_restore_pmu_state, NULL, 1);
- if (ret) {
- DPRINT(("on_each_cpu() failed: %d\n", ret));
- }
+ on_each_cpu(pfm_alt_restore_pmu_state, NULL, 1);
for_each_online_cpu(i) {
pfm_unreserve_session(NULL, 1, i);