Al Viro c27ca4aebb sparc32: fix a braino in fault handling in csum_and_copy_..._user() ... commit 1f36cd05e0 upstream. Fault handler used to make non-trivial calls, so it needed to set a stack frame up. Used to be save ... - grab a stack frame, old %o... become %i... .... ret - go back to address originally in %o7, currently %i7 restore - switch to previous stack frame, in delay slot Non-trivial calls had been gone since ab5e8b3312 and that code should have become retl - go back to address in %o7 clr %o0 - have return value set to 0 What it had become instead was ret - go back to address in %i7 - return address of *caller* clr %o0 - have return value set to 0 which is not good, to put it mildly - we forcibly return 0 from csum_and_copy_{from,to}_iter() (which is what the call of that thing had been inlined into) and do that without dropping the stack frame of said csum_and_copy_..._iter(). Confuses the hell out of the caller of csum_and_copy_..._iter(), obviously... Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Fixes: ab5e8b3312 "sparc32: propagate the calling conventions change down to __csum_partial_copy_sparc_generic()" Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-11-08 17:26:42 +01:00
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boot	sparc: Add missing "FORCE" target when using if_changed	2021-11-18 19:17:00 +01:00
configs	…
crypto	…
include	sparc/cpu: Switch to arch_cpu_finalize_init()	2023-08-08 19:58:31 +02:00
kernel	sparc/cpu: Switch to arch_cpu_finalize_init()	2023-08-08 19:58:31 +02:00
lib	sparc32: fix a braino in fault handling in csum_and_copy_..._user()	2023-11-08 17:26:42 +01:00
math-emu	…
mm	dma-mapping updates for Linux 5.15	2021-09-02 10:32:06 -07:00
net	bpf: Introduce BPF nospec instruction for mitigating Spectre v4	2021-07-29 00:20:56 +02:00
power	…
prom	…
vdso	…
Kbuild	…
Kconfig	sparc/cpu: Switch to arch_cpu_finalize_init()	2023-08-08 19:58:31 +02:00
Kconfig.debug	tracing: Refactor TRACE_IRQFLAGS_SUPPORT in Kconfig	2021-08-16 11:37:21 -04:00
Makefile	sparc: move the install rule to arch/sparc/Makefile	2021-09-03 08:17:20 +09:00