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| author | Helge Deller <deller@gmx.de> | 2026-03-09 17:16:37 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-03-25 13:13:16 +0300 |
| commit | e309b6b2f34e9a8a97f2797352bec42ca35d43bc (patch) | |
| tree | 159c1e9807f3825d64b1fd1f0d4964153c786627 /arch | |
| parent | b7c7a275447c6d4bf4a36a134682e2e4e20efd4b (diff) | |
| download | linux-e309b6b2f34e9a8a97f2797352bec42ca35d43bc.tar.xz | |
parisc: Flush correct cache in cacheflush() syscall
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/parisc/kernel/cache.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c index 4c5240d3a3c7..b189265785dc 100644 --- a/arch/parisc/kernel/cache.c +++ b/arch/parisc/kernel/cache.c @@ -953,7 +953,7 @@ SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, bytes, #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 long, addr, unsigned long, bytes, #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) |