Joel Stanley 4f703e7faa powerpc/s64: Clarify that radix lacks DEBUG_PAGEALLOC ... The page_alloc.c code will call into __kernel_map_pages() when DEBUG_PAGEALLOC is configured and enabled. As the implementation assumes hash, this should crash spectacularly if not for a bit of luck in __kernel_map_pages(). In this function linear_map_hash_count is always zero, the for loop exits without doing any damage. There are no other platforms that determine if they support debug_pagealloc at runtime. Instead of adding code to mm/page_alloc.c to do that, this change turns the map/unmap into a noop when in radix mode and prints a warning once. Signed-off-by: Joel Stanley <joel@jms.id.au> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> [mpe: Reformat if per Christophe's suggestion] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211013213438.675095-1-joel@jms.id.au		2021-10-22 15:22:02 +11:00
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asm	powerpc/s64: Clarify that radix lacks DEBUG_PAGEALLOC	2021-10-22 15:22:02 +11:00
uapi/asm	powerpc/perf: Expose instruction and data address registers as part of extended regs	2021-10-12 18:39:02 +11:00