kernel/linux.git/drivers/xen/mcelog.c, branch linux-7.1.y

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

xen/mcelog: simplify MCE_GETCLEAR_FLAGS using xchg()

2026-02-02T06:36:25+00:00

The MCE_GETCLEAR_FLAGS ioctl retrieves xen_mcelog.flags while atomically clearing it. This was previously implemented using a cmpxchg() loop. Replace the cmpxchg() loop with a single xchg(), which provides the same atomic get-and-clear semantics, avoids retry spinning under contention, and simplifies the code. The code on x86_64 improves from: 186: 8b 15 00 00 00 00 mov 0x0(%rip),%edx 18c: 89 d0 mov %edx,%eax 18e: f0 0f b1 0d 00 00 00 lock cmpxchg %ecx,0x0(%rip) 195: 00 196: 39 c2 cmp %eax,%edx 198: 75 ec jne 186 <...> to just: 186: 87 05 00 00 00 00 xchg %eax,0x0(%rip) No functional change intended. Signed-off-by: Uros Bizjak Cc: Juergen Gross Cc: Stefano Stabellini Cc: Oleksandr Tyshchenko Reviewed-by: Andrew Cooper Reviewed-by: Jan Beulich Signed-off-by: Juergen Gross Message-ID: <20260122141754.116129-1-ubizjak@gmail.com>

[tree-wide] finally take no_llseek out

2024-09-27T15:18:43+00:00

no_llseek had been defined to NULL two years ago, in commit 868941b14441 ("fs: remove no_llseek") To quote that commit, At -rc1 we'll need do a mechanical removal of no_llseek - git grep -l -w no_llseek | grep -v porting.rst | while read i; do sed -i '/\/d' $i done would do it. Unfortunately, that hadn't been done. Linus, could you do that now, so that we could finally put that thing to rest? All instances are of the form .llseek = no_llseek, so it's obviously safe. Signed-off-by: Al Viro Signed-off-by: Linus Torvalds

xen/mcelog: add PPIN to record when available

2019-11-14T09:01:57+00:00

This is to augment commit 3f5a7896a5 ("x86/mce: Include the PPIN in MCE records when available"). I'm also adding "synd" and "ipid" fields to struct xen_mce, in an attempt to keep field offsets in sync with struct mce. These two fields won't get populated for now, though. Signed-off-by: Jan Beulich Reviewed-by: Boris Ostrovsky Signed-off-by: Juergen Gross

xen/mcelog: drop __MC_MSR_MCGCAP

2019-11-14T08:45:32+00:00

It has never been part of Xen's public interface, and there's therefore no guarantee for MCG_CAP's value to always be present in array entry 0. Signed-off-by: Jan Beulich Reviewed-by: Boris Ostrovsky Signed-off-by: Juergen Gross

xen/mcelog: eliminate redundant setting of interface version

2018-08-20T18:46:18+00:00

This already gets done in HYPERVISOR_mca(). Signed-off-by: Jan Beulich Reviewed-by: Juergen Gross Signed-off-by: Boris Ostrovsky

vfs: do bulk POLL* -> EPOLL* replacement

2018-02-11T22:34:03+00:00

This is the mindless scripted replacement of kernel use of POLL* variables as described by Al, done by this script: for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'` for f in $L; do sed -i "-es/^$[^\"]*$$\$/\\1E\\2/" $f; done done with de-mangling cleanups yet to come. NOTE! On almost all architectures, the EPOLL* constants have the same values as the POLL* constants do. But they keyword here is "almost". For various bad reasons they aren't the same, and epoll() doesn't actually work quite correctly in some cases due to this on Sparc et al. The next patch from Al will sort out the final differences, and we should be all done. Scripted-by: Al Viro Signed-off-by: Linus Torvalds

the rest of drivers/*: annotate ->poll() instances

2017-11-28T16:06:58+00:00

Signed-off-by: Al Viro

x86/MCE, xen/mcelog: Make /dev/mcelog registration messages more precise

2017-06-20T21:25:19+00:00

When running under Xen as dom0, /dev/mcelog is being provided by Xen instead of the normal mcelog character device of the MCE core. Convert an error message being issued by the MCE core in this case to an informative message that Xen has registered the device. Signed-off-by: Juergen Gross Signed-off-by: Borislav Petkov Signed-off-by: Thomas Gleixner Cc: xen-devel@lists.xenproject.org Cc: Tony Luck Cc: linux-edac Link: http://lkml.kernel.org/r/20170614084059.19294-1-jgross@suse.com