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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-11-15 11:12:22 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-11-25 11:25:32 +1100 |
| commit | 8b8a8f0ab3f5519e45c526f826a655817486c5bb (patch) | |
| tree | 582258ab2bd7909fa1abeb803043832923002863 /arch/powerpc/mm/mem.c | |
| parent | a3bcfc182b2c968fd740101322bd128844724961 (diff) | |
| download | lwn-8b8a8f0ab3f5519e45c526f826a655817486c5bb.tar.gz lwn-8b8a8f0ab3f5519e45c526f826a655817486c5bb.zip | |
powerpc/code-patching: Improve verification of patchability
Today, patch_instruction() assumes that it is called exclusively on
valid addresses, and only checks that it is not called on an init
address after init section has been freed.
Improve verification by calling kernel_text_address() instead.
kernel_text_address() already includes a verification of
initmem release.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/bc683d499a411730504b132a924de0ccc2ef1f79.1636971137.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/mm/mem.c')
| -rw-r--r-- | arch/powerpc/mm/mem.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index bd5d91a31183..8e301cd8925b 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -26,7 +26,6 @@ #include <mm/mmu_decl.h> unsigned long long memory_limit; -bool init_mem_is_free; unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)] __page_aligned_bss; EXPORT_SYMBOL(empty_zero_page); @@ -312,7 +311,6 @@ void free_initmem(void) { ppc_md.progress = ppc_printk_progress; mark_initmem_nx(); - init_mem_is_free = true; free_initmem_default(POISON_FREE_INITMEM); } |