{"id":2227705,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2227705/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260424054742.45832-3-mkchauras@gmail.com/","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/1.1/projects/2/?format=json","name":"Linux PPC development","link_name":"linuxppc-dev","list_id":"linuxppc-dev.lists.ozlabs.org","list_email":"linuxppc-dev@lists.ozlabs.org","web_url":"https://github.com/linuxppc/wiki/wiki","scm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git","webscm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/"},"msgid":"<20260424054742.45832-3-mkchauras@gmail.com>","date":"2026-04-24T05:47:37","name":"[V13,2/7] dma-resv: Fix undefined symbol when CONFIG_DMA_SHARED_BUFFER is disabled","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"8d61622f50c4bdbc989a99250d879e9770aed298","submitter":{"id":92575,"url":"http://patchwork.ozlabs.org/api/1.1/people/92575/?format=json","name":"Mukesh Kumar Chaurasiya","email":"mkchauras@gmail.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260424054742.45832-3-mkchauras@gmail.com/mbox/","series":[{"id":501303,"url":"http://patchwork.ozlabs.org/api/1.1/series/501303/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=501303","date":"2026-04-24T05:47:35","name":"Rust support for powerpc","version":13,"mbox":"http://patchwork.ozlabs.org/series/501303/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2227705/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2227705/checks/","tags":{},"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=K9WghBJM;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=112.213.38.117; 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CONFIG_DEBUG_MUTEXES=y is enabled\n2. CONFIG_DMA_SHARED_BUFFER is not enabled\n3. dma_resv_reset_max_fences() is declared in the header when\n CONFIG_DEBUG_MUTEXES is set\n4. But the function is only compiled in drivers/dma-buf/dma-resv.c,\n which is only built when CONFIG_DMA_SHARED_BUFFER is enabled\n5. Rust helpers call dma_resv_unlock() which calls\n dma_resv_reset_max_fences(), causing an undefined symbol\n\nFix this by making the function declaration conditional on both\nCONFIG_DEBUG_MUTEXES and CONFIG_DMA_SHARED_BUFFER. When either is\ndisabled, use a static inline stub instead.\n\nFixes: 0c6b522abc2a (\"dma-buf: cleanup dma-resv shared fence debugging a bit v2\")\nSigned-off-by: Mukesh Kumar Chaurasiya (IBM) \n---\n include/linux/dma-resv.h | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)","diff":"diff --git a/include/linux/dma-resv.h b/include/linux/dma-resv.h\nindex c5ab6fd9ebe8..23c8db0b5214 100644\n--- a/include/linux/dma-resv.h\n+++ b/include/linux/dma-resv.h\n@@ -311,7 +311,7 @@ static inline bool dma_resv_iter_is_restarted(struct dma_resv_iter *cursor)\n #define dma_resv_held(obj) lockdep_is_held(&(obj)->lock.base)\n #define dma_resv_assert_held(obj) lockdep_assert_held(&(obj)->lock.base)\n \n-#ifdef CONFIG_DEBUG_MUTEXES\n+#if IS_ENABLED(CONFIG_DEBUG_MUTEXES) && IS_ENABLED(CONFIG_DMA_SHARED_BUFFER)\n void dma_resv_reset_max_fences(struct dma_resv *obj);\n #else\n static inline void dma_resv_reset_max_fences(struct dma_resv *obj) {}\n","prefixes":["V13","2/7"]}