* [PATCH 2/2] powerpc: export memory encryption helper functions [not found] <20260526102113.2594501-1-arnd@kernel.org> @ 2026-05-26 10:20 ` Arnd Bergmann 2026-05-26 11:53 ` Christophe Leroy (CS GROUP) 0 siblings, 1 reply; 2+ messages in thread From: Arnd Bergmann @ 2026-05-26 10:20 UTC (permalink / raw) To: Madhavan Srinivasan, Michael Ellerman, T.J. Mercier, Maxime Ripard, Sumit Semwal, Andrew Davis Cc: Arnd Bergmann, Nicholas Piggin, Christophe Leroy (CS GROUP), linuxppc-dev, linux-kernel From: Arnd Bergmann <arnd@arndb•de> The set_memory_encrypted/set_memory_decrypted functions are exported on x86 and arm64 but not on powerpc, which leads to a new build failure because they are now used in a loadable module: ERROR: modpost: "set_memory_encrypted" [drivers/dma-buf/heaps/system_heap.ko] undefined! ERROR: modpost: "set_memory_decrypted" [drivers/dma-buf/heaps/system_heap.ko] undefined! Export these the same way we do on the other architectures. Fixes: fd55edff8a0a ("dma-buf: heaps: system: Turn the heap into a module") Signed-off-by: Arnd Bergmann <arnd@arndb•de> --- arch/powerpc/platforms/pseries/svm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/powerpc/platforms/pseries/svm.c b/arch/powerpc/platforms/pseries/svm.c index 384c9dc1899a..ab8f8c722741 100644 --- a/arch/powerpc/platforms/pseries/svm.c +++ b/arch/powerpc/platforms/pseries/svm.c @@ -6,6 +6,7 @@ * Author: Anshuman Khandual <khandual@linux•vnet.ibm.com> */ +#include <linux/export.h> #include <linux/mm.h> #include <linux/memblock.h> #include <linux/mem_encrypt.h> @@ -50,6 +51,7 @@ int set_memory_encrypted(unsigned long addr, int numpages) return 0; } +EXPORT_SYMBOL_GPL(set_memory_encrypted); int set_memory_decrypted(unsigned long addr, int numpages) { @@ -63,6 +65,7 @@ int set_memory_decrypted(unsigned long addr, int numpages) return 0; } +EXPORT_SYMBOL_GPL(set_memory_decrypted); /* There's one dispatch log per CPU. */ #define NR_DTL_PAGE (DISPATCH_LOG_BYTES * CONFIG_NR_CPUS / PAGE_SIZE) -- 2.39.5 ^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH 2/2] powerpc: export memory encryption helper functions 2026-05-26 10:20 ` [PATCH 2/2] powerpc: export memory encryption helper functions Arnd Bergmann @ 2026-05-26 11:53 ` Christophe Leroy (CS GROUP) 0 siblings, 0 replies; 2+ messages in thread From: Christophe Leroy (CS GROUP) @ 2026-05-26 11:53 UTC (permalink / raw) To: Arnd Bergmann, Madhavan Srinivasan, Michael Ellerman, T.J. Mercier, Maxime Ripard, Sumit Semwal, Andrew Davis, Christoph Hellwig Cc: Arnd Bergmann, Nicholas Piggin, linuxppc-dev, linux-kernel Hi Arnd, Le 26/05/2026 à 12:20, Arnd Bergmann a écrit : > From: Arnd Bergmann <arnd@arndb•de> > > The set_memory_encrypted/set_memory_decrypted functions are exported > on x86 and arm64 but not on powerpc, which leads to a new build failure > because they are now used in a loadable module: > > ERROR: modpost: "set_memory_encrypted" [drivers/dma-buf/heaps/system_heap.ko] undefined! > ERROR: modpost: "set_memory_decrypted" [drivers/dma-buf/heaps/system_heap.ko] undefined! > > Export these the same way we do on the other architectures. The same fix was rejected already, see https://lore.kernel.org/all/ahPqbfH54R3JJyaV@infradead.org/ Christophe > > Fixes: fd55edff8a0a ("dma-buf: heaps: system: Turn the heap into a module") > Signed-off-by: Arnd Bergmann <arnd@arndb•de> > --- > arch/powerpc/platforms/pseries/svm.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/powerpc/platforms/pseries/svm.c b/arch/powerpc/platforms/pseries/svm.c > index 384c9dc1899a..ab8f8c722741 100644 > --- a/arch/powerpc/platforms/pseries/svm.c > +++ b/arch/powerpc/platforms/pseries/svm.c > @@ -6,6 +6,7 @@ > * Author: Anshuman Khandual <khandual@linux•vnet.ibm.com> > */ > > +#include <linux/export.h> > #include <linux/mm.h> > #include <linux/memblock.h> > #include <linux/mem_encrypt.h> > @@ -50,6 +51,7 @@ int set_memory_encrypted(unsigned long addr, int numpages) > > return 0; > } > +EXPORT_SYMBOL_GPL(set_memory_encrypted); > > int set_memory_decrypted(unsigned long addr, int numpages) > { > @@ -63,6 +65,7 @@ int set_memory_decrypted(unsigned long addr, int numpages) > > return 0; > } > +EXPORT_SYMBOL_GPL(set_memory_decrypted); > > /* There's one dispatch log per CPU. */ > #define NR_DTL_PAGE (DISPATCH_LOG_BYTES * CONFIG_NR_CPUS / PAGE_SIZE) ^ permalink raw reply [flat|nested] 2+ messages in thread
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2026-05-26 10:20 ` [PATCH 2/2] powerpc: export memory encryption helper functions Arnd Bergmann
2026-05-26 11:53 ` Christophe Leroy (CS GROUP)
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