[ARM] 3470/1: Clear the HWCAP bits for the disabled kernel features

Patch from Catalin Marinas

Glibc interprets the HWCAP bits and decides on what features to use.
However, even if the features are present in the hardware, they are not
always supported by the kernel and hence the corresponding bits have to be
cleared from the elf_hwcap variable.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 437528403959..8cff73e668b3 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -322,6 +322,12 @@ static void __init setup_processor(void)
         sprintf(system_utsname.machine, "%s%c", list->arch_name, ENDIANNESS);
         sprintf(elf_platform, "%s%c", list->elf_name, ENDIANNESS);
         elf_hwcap = list->elf_hwcap;
+#ifndef CONFIG_ARM_THUMB
+        elf_hwcap &= ~HWCAP_THUMB;
+#endif
+#ifndef CONFIG_VFP
+        elf_hwcap &= ~HWCAP_VFP;
+#endif
 
         cpu_proc_init();
 }