diff options
| author |   Nicholas Piggin <npiggin@gmail.com> | 2022-10-14 09:07:10 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2022-10-18 22:46:18 +1100 |
| commit | b12eb279ff552bd67c167b0fe701ae602aa7311e (patch) | |
| tree | 5ab5b99b61c949704ddebfb40e37d9e8350c1e05 /arch/powerpc/mm | |
| parent | powerpc/64s: make HPTE lock and native_tlbie_lock irq-safe (diff) | |
| download | linux-dev-b12eb279ff552bd67c167b0fe701ae602aa7311e.tar.xz linux-dev-b12eb279ff552bd67c167b0fe701ae602aa7311e.zip | |
powerpc/64s: make linear_map_hash_lock a raw spinlock
This lock is taken while the raw kfence_freelist_lock is held, so it
must also be a raw spinlock, as reported by lockdep when raw lock
nesting checking is enabled.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221013230710.1987253-3-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/book3s64/hash_utils.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/arch/powerpc/mm/book3s64/hash_utils.c b/arch/powerpc/mm/book3s64/hash_utils.c index df008edf7be0..6df4c6d38b66 100644 --- a/arch/powerpc/mm/book3s64/hash_utils.c +++ b/arch/powerpc/mm/book3s64/hash_utils.c @@ -1981,7 +1981,7 @@ repeat: } #if defined(CONFIG_DEBUG_PAGEALLOC) || defined(CONFIG_KFENCE) -static DEFINE_SPINLOCK(linear_map_hash_lock); +static DEFINE_RAW_SPINLOCK(linear_map_hash_lock); static void kernel_map_linear_page(unsigned long vaddr, unsigned long lmi) { @@ -2005,10 +2005,10 @@ static void kernel_map_linear_page(unsigned long vaddr, unsigned long lmi) mmu_linear_psize, mmu_kernel_ssize); BUG_ON (ret < 0); - spin_lock(&linear_map_hash_lock); + raw_spin_lock(&linear_map_hash_lock); BUG_ON(linear_map_hash_slots[lmi] & 0x80); linear_map_hash_slots[lmi] = ret | 0x80; - spin_unlock(&linear_map_hash_lock); + raw_spin_unlock(&linear_map_hash_lock); } static void kernel_unmap_linear_page(unsigned long vaddr, unsigned long lmi) @@ -2018,14 +2018,14 @@ static void kernel_unmap_linear_page(unsigned long vaddr, unsigned long lmi) unsigned long vpn = hpt_vpn(vaddr, vsid, mmu_kernel_ssize); hash = hpt_hash(vpn, PAGE_SHIFT, mmu_kernel_ssize); - spin_lock(&linear_map_hash_lock); + raw_spin_lock(&linear_map_hash_lock); if (!(linear_map_hash_slots[lmi] & 0x80)) { - spin_unlock(&linear_map_hash_lock); + raw_spin_unlock(&linear_map_hash_lock); return; } hidx = linear_map_hash_slots[lmi] & 0x7f; linear_map_hash_slots[lmi] = 0; - spin_unlock(&linear_map_hash_lock); + raw_spin_unlock(&linear_map_hash_lock); if (hidx & _PTEIDX_SECONDARY) hash = ~hash; slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; |