diff options
| author | Andy Lutomirski <luto@amacapital.net> | 2014-05-05 21:19:36 +0200 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2014-05-05 22:19:01 +0200 |
| commit | f40c330091c7aa9956ab66f97a3abc8a68b67240 (patch) | |
| tree | b0c03dce9bf67eb15c98980a7323ca35122d10df /arch/x86/vdso | |
| parent | x86, vdso: Move the 32-bit vdso special pages after the text (diff) | |
| download | linux-f40c330091c7aa9956ab66f97a3abc8a68b67240.tar.xz linux-f40c330091c7aa9956ab66f97a3abc8a68b67240.zip | |
x86, vdso: Move the vvar and hpet mappings next to the 64-bit vDSO
This makes the 64-bit and x32 vdsos use the same mechanism as the
32-bit vdso. Most of the churn is deleting all the old fixmap code.
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Link: http://lkml.kernel.org/r/8af87023f57f6bb96ec8d17fce3f88018195b49b.1399317206.git.luto@amacapital.net
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/vdso')
| -rw-r--r-- | arch/x86/vdso/vclock_gettime.c | 22 | ||||
| -rw-r--r-- | arch/x86/vdso/vdso-layout.lds.S | 2 |
2 files changed, 5 insertions, 19 deletions
diff --git a/arch/x86/vdso/vclock_gettime.c b/arch/x86/vdso/vclock_gettime.c index 091554c20bc9..b2e4f493e5b0 100644 --- a/arch/x86/vdso/vclock_gettime.c +++ b/arch/x86/vdso/vclock_gettime.c @@ -30,9 +30,12 @@ extern int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz); extern time_t __vdso_time(time_t *t); #ifdef CONFIG_HPET_TIMER -static inline u32 read_hpet_counter(const volatile void *addr) +extern u8 hpet_page + __attribute__((visibility("hidden"))); + +static notrace cycle_t vread_hpet(void) { - return *(const volatile u32 *) (addr + HPET_COUNTER); + return *(const volatile u32 *)(&hpet_page + HPET_COUNTER); } #endif @@ -43,11 +46,6 @@ static inline u32 read_hpet_counter(const volatile void *addr) #include <asm/fixmap.h> #include <asm/pvclock.h> -static notrace cycle_t vread_hpet(void) -{ - return read_hpet_counter((const void *)fix_to_virt(VSYSCALL_HPET)); -} - notrace static long vdso_fallback_gettime(long clock, struct timespec *ts) { long ret; @@ -137,16 +135,6 @@ static notrace cycle_t vread_pvclock(int *mode) #else -extern u8 hpet_page - __attribute__((visibility("hidden"))); - -#ifdef CONFIG_HPET_TIMER -static notrace cycle_t vread_hpet(void) -{ - return read_hpet_counter((const void *)(&hpet_page)); -} -#endif - notrace static long vdso_fallback_gettime(long clock, struct timespec *ts) { long ret; diff --git a/arch/x86/vdso/vdso-layout.lds.S b/arch/x86/vdso/vdso-layout.lds.S index e177c08bb4bc..2ec72f651ebf 100644 --- a/arch/x86/vdso/vdso-layout.lds.S +++ b/arch/x86/vdso/vdso-layout.lds.S @@ -47,7 +47,6 @@ SECTIONS .text : { *(.text*) } :text =0x90909090, -#ifdef BUILD_VDSO32 /* * The remainder of the vDSO consists of special pages that are * shared between the kernel and userspace. It needs to be at the @@ -69,7 +68,6 @@ SECTIONS hpet_page = .; . = . + PAGE_SIZE; -#endif . = ALIGN(PAGE_SIZE); end_mapping = .; |