fd1374c...
by
Linus Torvalds <email address hidden>
x86: inline the 'rep movs' in user copies for the FSRM case
This does the same thing for the user copies as commit 0db7058e8e23
("x86/clear_user: Make it faster") did for clear_user(). In other
words, it inlines the "rep movs" case when X86_FEATURE_FSRM is set,
avoiding the function call entirely.
In order to do that, it makes the calling convention for the out-of-line
case ("copy_user_generic_unrolled") match the 'rep movs' calling
convention, although it does also end up clobbering a number of
additional registers.
Also, to simplify code sharing in the low-level assembly with the
__copy_user_nocache() function (that uses the normal C calling
convention), we end up with a kind of mixed return value for the
low-level asm code: it will return the result in both %rcx (to work as
an alternative for the 'rep movs' case), _and_ in %rax (for the nocache
case).
We could avoid this by wrapping __copy_user_nocache() callers in an
inline asm, but since the cost is just an extra register copy, it's
probably not worth it.
5e10834...
by
Linus Torvalds <email address hidden>
x86: move stac/clac from user copy routines into callers
This is preparatory work for inlining the 'rep movs' case, but also a
cleanup. The __copy_user_nocache() function was mis-used by the rdma
code to do uncached kernel copies that don't actually want user copies
at all, and as a result doesn't want the stac/clac either.
f3d3db5...
by
Linus Torvalds <email address hidden>
x86: don't use REP_GOOD or ERMS for user memory clearing
The modern target to use is FSRS (Fast Short REP STOS), and the other
cases should only be used for bigger areas (ie mainly things like page
clearing).
Note! This changes the conditional for the inlining from FSRM ("fast
movs") to the proper FSRS ("fast stos"). We should check if there are
microarchitectures that have a good 'rep stosb' that do not set that bit
(ie particularly some AMD).
2e559ed...
by
Linus Torvalds <email address hidden>
x86: don't use REP_GOOD or ERMS for user memory copies
The modern target to use is FSRS (Fast Short REP STOS), and the other
cases should only be used for bigger areas (ie mainly things like page
clearing).
a7e645c...
by
Linus Torvalds <email address hidden>
x86: don't use REP_GOOD or ERMS for small memory clearing
The modern target to use is FSRS (Fast Short REP STOS), and the other
cases should only be used for bigger areas (ie mainly things like page
clearing).
c7713a8...
by
Linus Torvalds <email address hidden>
x86: don't use REP_GOOD or ERMS for small memory copies
The modern target to use is FSRM (Fast Short REP MOVS), and the other
cases should only be used for bigger areas (ie mainly things like page
copying and clearing).
3e7bb4f...
by
Linus Torvalds <email address hidden>
Merge tag '6.3-rc6-smb311-client-negcontext-fix' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fix from Steve French:
"Small client fix for better checking for smb311 negotiate context
overflows, also marked for stable"
* tag '6.3-rc6-smb311-client-negcontext-fix' of git://git.samba.org/sfrench/cifs-2.6:
cifs: fix negotiate context parsing
bc88aa5...
by
Linus Torvalds <email address hidden>
Merge tag 'ubifs-for-linus-6.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs
Pull UBI fixes from Richard Weinberger:
- Fix failure to attach when vid_hdr offset equals the (sub)page size
- Fix for a deadlock in UBI's worker thread
* tag 'ubifs-for-linus-6.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs:
ubi: Fix failure attaching when vid_hdr offset equals to (sub)page size
ubi: Fix deadlock caused by recursively holding work_sem
smb311_decode_neg_context() doesn't properly check against SMB packet
boundaries prior to accessing individual negotiate context entries. This
is due to the length check omitting the eight byte smb2_neg_context
header, as well as incorrect decrementing of len_of_ctxts.
Fixes: 5100d8a3fe03 ("SMB311: Improve checking of negotiate security contexts")
Reported-by: Volker Lendecke <email address hidden>
Reviewed-by: Paulo Alcantara (SUSE) <email address hidden>
Signed-off-by: David Disseldorp <email address hidden>
Signed-off-by: Steve French <email address hidden>
a7a55e2...
by
Linus Torvalds <email address hidden>
Merge tag 'i2c-for-6.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
"Just two driver fixes"
* tag 'i2c-for-6.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: ocores: generate stop condition after timeout in polling mode
i2c: mchp-pci1xxxx: Update Timing registers
