diff options
| author | Heiko Carstens <hca@linux.ibm.com> | 2025-02-07 15:48:49 +0100 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2025-03-04 17:18:04 +0100 |
| commit | 42805261fcea809e1e76243dfc5218f6f12c1614 (patch) | |
| tree | 60fdd12746484a286233fcfd1a738990752629ee /arch/s390/kernel/processor.c | |
| parent | 15a36036e792f4eec0fc59833dde688024e036fc (diff) | |
s390/cpufeature: Convert MACHINE_HAS_GS to cpu_has_gs()
Convert MACHINE_HAS_... to cpu_has_...() which uses test_facility() instead
of testing the machine_flags lowcore member if the feature is present.
test_facility() generates better code since it results in a static branch
without accessing memory. The branch is patched via alternatives by the
decompressor depending on the availability of the required facility.
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/kernel/processor.c')
| -rw-r--r-- | arch/s390/kernel/processor.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c index 5ce9a795a0fe..c8ce8474d769 100644 --- a/arch/s390/kernel/processor.c +++ b/arch/s390/kernel/processor.c @@ -8,6 +8,7 @@ #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt #include <linux/stop_machine.h> +#include <linux/cpufeature.h> #include <linux/bitops.h> #include <linux/kernel.h> #include <linux/random.h> @@ -244,7 +245,7 @@ static int __init setup_hwcaps(void) elf_hwcap |= HWCAP_NNPA; /* guarded storage */ - if (MACHINE_HAS_GS) + if (cpu_has_gs()) elf_hwcap |= HWCAP_GS; if (MACHINE_HAS_PCI_MIO) |