Update Linux to v5.10.109
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz
Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c
index 3861543..f5657cb 100644
--- a/arch/arc/mm/fault.c
+++ b/arch/arc/mm/fault.c
@@ -13,7 +13,6 @@
#include <linux/kdebug.h>
#include <linux/perf_event.h>
#include <linux/mm_types.h>
-#include <asm/pgalloc.h>
#include <asm/mmu.h>
/*
@@ -30,6 +29,7 @@
* with the 'reference' page table.
*/
pgd_t *pgd, *pgd_k;
+ p4d_t *p4d, *p4d_k;
pud_t *pud, *pud_k;
pmd_t *pmd, *pmd_k;
@@ -39,8 +39,13 @@
if (!pgd_present(*pgd_k))
goto bad_area;
- pud = pud_offset(pgd, address);
- pud_k = pud_offset(pgd_k, address);
+ p4d = p4d_offset(pgd, address);
+ p4d_k = p4d_offset(pgd_k, address);
+ if (!p4d_present(*p4d_k))
+ goto bad_area;
+
+ pud = pud_offset(p4d, address);
+ pud_k = pud_offset(p4d_k, address);
if (!pud_present(*pud_k))
goto bad_area;
@@ -94,14 +99,15 @@
(regs->ecr_cause == ECR_C_PROTV_INST_FETCH))
exec = 1;
- flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
+ flags = FAULT_FLAG_DEFAULT;
if (user_mode(regs))
flags |= FAULT_FLAG_USER;
if (write)
flags |= FAULT_FLAG_WRITE;
+ perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
retry:
- down_read(&mm->mmap_sem);
+ mmap_read_lock(mm);
vma = find_vma(mm, address);
if (!vma)
@@ -125,56 +131,34 @@
goto bad_area;
}
- fault = handle_mm_fault(vma, address, flags);
+ fault = handle_mm_fault(vma, address, flags, regs);
+
+ /* Quick path to respond to signals */
+ if (fault_signal_pending(fault, regs)) {
+ if (!user_mode(regs))
+ goto no_context;
+ return;
+ }
/*
- * Fault retry nuances
+ * Fault retry nuances, mmap_lock already relinquished by core mm
*/
- if (unlikely(fault & VM_FAULT_RETRY)) {
-
- /*
- * If fault needs to be retried, handle any pending signals
- * first (by returning to user mode).
- * mmap_sem already relinquished by core mm for RETRY case
- */
- if (fatal_signal_pending(current)) {
- if (!user_mode(regs))
- goto no_context;
- return;
- }
- /*
- * retry state machine
- */
- if (flags & FAULT_FLAG_ALLOW_RETRY) {
- flags &= ~FAULT_FLAG_ALLOW_RETRY;
- flags |= FAULT_FLAG_TRIED;
- goto retry;
- }
+ if (unlikely((fault & VM_FAULT_RETRY) &&
+ (flags & FAULT_FLAG_ALLOW_RETRY))) {
+ flags |= FAULT_FLAG_TRIED;
+ goto retry;
}
bad_area:
- up_read(&mm->mmap_sem);
+ mmap_read_unlock(mm);
/*
* Major/minor page fault accounting
* (in case of retry we only land here once)
*/
- perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
-
- if (likely(!(fault & VM_FAULT_ERROR))) {
- if (fault & VM_FAULT_MAJOR) {
- tsk->maj_flt++;
- perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1,
- regs, address);
- } else {
- tsk->min_flt++;
- perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1,
- regs, address);
- }
-
+ if (likely(!(fault & VM_FAULT_ERROR)))
/* Normal return path: fault Handled Gracefully */
return;
- }
if (!user_mode(regs))
goto no_context;