diff options
| author | Helge Deller <deller@gmx.de> | 2023-03-15 19:25:15 +0100 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2023-05-03 17:43:26 +0200 |
| commit | d755bd2caeb47fd806e12399fe8b56798fa5d2cc (patch) | |
| tree | 1a66d9d3713b25085cd6c09718d642dfc41ec6ce /arch/parisc | |
| parent | 829632dae8321787525ee37dc4828bbe6edafdae (diff) | |
parisc: Ensure page alignment in flush functions
Matthew Wilcox noticed, that if ARCH_HAS_FLUSH_ON_KUNMAP is defined
(which is the case for PA-RISC), __kunmap_local() calls
kunmap_flush_on_unmap(), which may call the parisc flush functions with
a non-page-aligned address and thus the page might not be fully flushed.
This patch ensures that flush_kernel_dcache_page_asm() and
flush_kernel_dcache_page_asm() will always operate on page-aligned
addresses.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org> # v6.0+
Diffstat (limited to 'arch/parisc')
| -rw-r--r-- | arch/parisc/kernel/pacache.S | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/parisc/kernel/pacache.S b/arch/parisc/kernel/pacache.S index 9a0018f1f42c..541370d14559 100644 --- a/arch/parisc/kernel/pacache.S +++ b/arch/parisc/kernel/pacache.S @@ -889,6 +889,7 @@ ENDPROC_CFI(flush_icache_page_asm) ENTRY_CFI(flush_kernel_dcache_page_asm) 88: ldil L%dcache_stride, %r1 ldw R%dcache_stride(%r1), %r23 + depi_safe 0, 31,PAGE_SHIFT, %r26 /* Clear any offset bits */ #ifdef CONFIG_64BIT depdi,z 1, 63-PAGE_SHIFT,1, %r25 @@ -925,6 +926,7 @@ ENDPROC_CFI(flush_kernel_dcache_page_asm) ENTRY_CFI(purge_kernel_dcache_page_asm) 88: ldil L%dcache_stride, %r1 ldw R%dcache_stride(%r1), %r23 + depi_safe 0, 31,PAGE_SHIFT, %r26 /* Clear any offset bits */ #ifdef CONFIG_64BIT depdi,z 1, 63-PAGE_SHIFT,1, %r25 |