[PATCH 6.19 017/220] parisc: Flush correct cache in cacheflush() syscall

Greg Kroah-Hartman
2026-03-23T13:50:12Z

From: Helge Deller <deller@gmx.de>

commit 2c98a8fbd6aa647414c6248dacf254ebe91c79ad upstream.

The assembly flush instructions were swapped for I- and D-cache flags:

SYSCALL_DEFINE3(cacheflush, ...)
{
if (cache & DCACHE) {
"fic ...\n"
}
if (cache & ICACHE && error == 0) {
"fdc ...\n"
}

Fix it by using fdc for DCACHE, and fic for ICACHE flushing.

Reported-by: Felix Lechner <felix.lechner@lease-up.com>
Fixes: c6d96328fecd ("parisc: Add cacheflush() syscall")
Cc: <stable@vger.kernel.org> # v6.5+
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/parisc/kernel/cache.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -953,7 +953,7 @@ SYSCALL_DEFINE3(cacheflush, unsigned lon
#else
"1: cmpb,<<,n %0,%2,1b\n"
#endif
- " fic,m %3(%4,%0)\n"
+ " fdc,m %3(%4,%0)\n"
"2: sync\n"
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 2b, "%1")
: "+r" (start), "+r" (error)
@@ -968,7 +968,7 @@ SYSCALL_DEFINE3(cacheflush, unsigned lon
#else
"1: cmpb,<<,n %0,%2,1b\n"
#endif
- " fdc,m %3(%4,%0)\n"
+ " fic,m %3(%4,%0)\n"
"2: sync\n"
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 2b, "%1")
: "+r" (start), "+r" (error)