Anna-Maria Behnsen
56145a0f84
csky/vdso: Use generic union vdso_data_store
...
There is already a generic union definition for vdso_data_store in the vdso
datapage header.
Use this definition to prevent code duplication.
Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de >
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com >
Reviewed-by: Kees Cook <keescook@chromium.org >
Acked-by: Guo Ren <guoren@kernel.org >
Link: https://lore.kernel.org/r/20240219153939.75719-11-anna-maria@linutronix.de
2024-02-20 20:56:01 +01:00
Anna-Maria Behnsen
4eb0833d7d
csky/vdso: Remove superfluous ifdeffery
...
CSKY selects GENERIC_TIME_VSYSCALL. GENERIC_TIME_VSYSCALL dependent
ifdeffery is superfluous. Clean it up.
Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de >
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com >
Reviewed-by: Kees Cook <keescook@chromium.org >
Acked-by: Guo Ren <guoren@kernel.org >
Link: https://lore.kernel.org/r/20240219153939.75719-4-anna-maria@linutronix.de
2024-02-20 20:56:00 +01:00
Guo Ren
0d3b051adb
csky: Add VDSO with GENERIC_GETTIMEOFDAY, GENERIC_TIME_VSYSCALL, HAVE_GENERIC_VDSO
...
It could help to reduce the latency of the time-related functions
in user space.
We have referenced arm's and riscv's implementation for the patch.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com >
Cc: Vincent Chen <vincent.chen@sifive.com >
Cc: Arnd Bergmann <arnd@arndb.de >
2021-02-27 16:35:09 +08:00
Guo Ren
87f3248cdb
csky: Reconstruct VDSO framework
...
Reconstruct vdso framework to support future vsyscall,
vgettimeofday features. These are very important features to reduce
system calls into the kernel for performance improvement.
The patch is reference RISC-V's
Signed-off-by: Guo Ren <guoren@linux.alibaba.com >
Cc: Palmer Dabbelt <palmerdabbelt@google.com >
2021-01-12 09:52:41 +08:00
Michel Lespinasse
d8ed45c5dc
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
...
This change converts the existing mmap_sem rwsem calls to use the new mmap
locking API instead.
The change is generated using coccinelle with the following rule:
// spatch --sp-file mmap_lock_api.cocci --in-place --include-headers --dir .
@@
expression mm;
@@
(
-init_rwsem
+mmap_init_lock
|
-down_write
+mmap_write_lock
|
-down_write_killable
+mmap_write_lock_killable
|
-down_write_trylock
+mmap_write_trylock
|
-up_write
+mmap_write_unlock
|
-downgrade_write
+mmap_write_downgrade
|
-down_read
+mmap_read_lock
|
-down_read_killable
+mmap_read_lock_killable
|
-down_read_trylock
+mmap_read_trylock
|
-up_read
+mmap_read_unlock
)
-(&mm->mmap_sem)
+(mm)
Signed-off-by: Michel Lespinasse <walken@google.com >
Signed-off-by: Andrew Morton <akpm@linux-foundation.org >
Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com >
Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com >
Reviewed-by: Vlastimil Babka <vbabka@suse.cz >
Cc: Davidlohr Bueso <dbueso@suse.de >
Cc: David Rientjes <rientjes@google.com >
Cc: Hugh Dickins <hughd@google.com >
Cc: Jason Gunthorpe <jgg@ziepe.ca >
Cc: Jerome Glisse <jglisse@redhat.com >
Cc: John Hubbard <jhubbard@nvidia.com >
Cc: Liam Howlett <Liam.Howlett@oracle.com >
Cc: Matthew Wilcox <willy@infradead.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Ying Han <yinghan@google.com >
Link: http://lkml.kernel.org/r/20200520052908.204642-5-walken@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org >
2020-06-09 09:39:14 -07:00
Guo Ren
dd3ef10ea2
csky: VDSO and rt_sigreturn
...
This patch adds files related to VDSO and our VDSO only support
rt_sigreturn.
Signed-off-by: Guo Ren <ren_guo@c-sky.com >
Reviewed-by: Arnd Bergmann <arnd@arndb.de >
2018-10-26 00:54:22 +08:00
