This script finds instances of allocate and memset which can be
replaced with a direct call to zalloc equivalent of a function.
Signed-off-by: Amitoj Kaur Chawla <amitoj1...@gmail.com>
Acked-by: Julia Lawall <julia.law...@lip6.fr>
---
Changes in v2:
-Modified commit message and subject
Changes in v3:
-Modified comment
scripts/coccinelle/api/zalloc.cocci | 556 ++++++++++++++++++++++++++++++++++++
1 file changed, 556 insertions(+)
create mode 100644 scripts/coccinelle/api/zalloc.cocci
diff --git a/scripts/coccinelle/api/zalloc.cocci
b/scripts/coccinelle/api/zalloc.cocci
new file mode 100644
index 0000000..4f94e43
--- /dev/null
+++ b/scripts/coccinelle/api/zalloc.cocci
@@ -0,0 +1,556 @@
+/// Prefer zalloc functions instead of using allocate and memset.
+///
+// Confidence: High
+// Copyright: (C) 2016 Amitoj Kaur Chawla
+
+virtual patch
+virtual context
+virtual org
+virtual report
+
+@dma1 depends on patch && !context && !org && !report@
+type T;
+T *d;
+statement S;
+@@
+
+ d =
+- dma_pool_alloc
++ dma_pool_zalloc
+ (...);
+ if (!d) S
+- memset(d, 0, sizeof(T));
+
+@dma2 depends on patch && !context && !org && !report@
+expression d;
+statement S;
+@@
+
+ d =
+- dma_pool_alloc
++ dma_pool_zalloc
+ (...);
+ if (!d) S
+- memset(d, 0, sizeof(*d));
+@vz1 depends on patch && !context && !org && !report@
+type T;
+T *d;
+statement S;
+@@
+
+ d =
+- vmalloc
++ vzalloc
+ (...);
+ if (!d) S
+- memset(d, 0, sizeof(T));
+
+@vz2 depends on patch && !context && !org && !report@
+expression d;
+statement S;
+@@
+
+ d =
+- vmalloc
++ vzalloc
+ (...);
+ if (!d) S
+- memset(d, 0, sizeof(*d));
+@vzn1 depends on patch && !context && !org && !report@
+type T;
+T *d;
+statement S;
+@@
+
+ d =
+- vmalloc_node
++ vzalloc_node
+ (...);
+ if (!d) S
+- memset(d, 0, sizeof(T));
+
+@vzn2 depends on patch && !context && !org && !report@
+expression d;
+statement S;
+@@
+
+ d =
+- vmalloc_node
++ vzalloc_node
+ (...);
+ if (!d) S
+- memset(d, 0, sizeof(*d));
+@pci1 depends on patch && !context && !org && !report@
+type T;
+T *d;
+statement S;
+@@
+
+ d =
+- pci_alloc_consistent
++ pci_zalloc_consistent
+ (...);
+ if (!d) S
+- memset(d, 0, sizeof(T));
+
+@pci2 depends on patch && !context && !org && !report@
+expression d;
+statement S;
+@@
+
+ d =
+- pci_alloc_consistent
++ pci_zalloc_consistent
+ (...);
+ if (!d) S
+- memset(d, 0, sizeof(*d));
+@kmem1 depends on patch && !context && !org && !report@
+type T;
+T *d;
+statement S;
+@@
+
+ d =
+- kmem_cache_alloc
++ kmem_cache_zalloc
+ (...);
+ if (!d) S
+- memset(d, 0, sizeof(T));
+
+@kmem2 depends on patch && !context && !org && !report@
+expression d;
+statement S;
+@@
+
+ d =
+- kmem_cache_alloc
++ kmem_cache_zalloc
+ (...);
+ if (!d) S
+- memset(d, 0, sizeof(*d));
+@dma3 depends on patch && !context && !org && !report@
+type T;
+T *d;
+statement S;
+@@
+
+ d =
+- dma_alloc_coherent
++ dma_zalloc_coherent
+ (...);
+ if (!d) S
+- memset(d, 0, sizeof(T));
+
+@dma4 depends on patch && !context && !org && !report@
+expression d;
+statement S;
+@@
+
+ d =
+- dma_alloc_coherent
++ dma_zalloc_coherent
+ (...);
+ if (!d) S
+- memset(d, 0, sizeof(*d));
+@acpi1 depends on patch && !context && !org && !report@
+type T;
+T *d;
+statement S;
+@@
+
+ d =
+- acpi_os_allocate
++ acpi_os_allocate_zeroed
+ (...);
+ if (!d) S
+- memset(d, 0, sizeof(T));
+
+@acpi2 depends on patch && !context && !org && !report@
+expression d;
+statement S;
+@@
+
+ d =
+- acpi_os_allocate
++ acpi_os_allocate_zeroed
+ (...);
+ if (!d) S
+- memset(d, 0, sizeof(*d));
+
+// ----------------------------------------------------------------------------
+
+@dma1_context depends on !patch && (context || org || report)@
+type T;
+statement S;
+T *d;
+position j0;
+@@
+
+ d@j0 =
+* dma_pool_alloc
+ (...);
+ if (!d) S
+* memset(d, 0, sizeof(T));
+
+@dma2_context depends on !patch && (context || org || report)@
+statement S;
+expression d;
+position j0;
+@@
+
+ d@j0 =
+* dma_pool_alloc
+ (...);
+ if (!d) S
+* memset(d, 0, sizeof(*d));
+
+@vz1_context depends on !patch && (context || org || report)@
+type T;
+statement S;
+T *d;
+position j0;
+@@
+
+ d@j0 =
+* vmalloc
+ (...);
+ if (!d) S
+* memset(d, 0, sizeof(T));
+
+@vz2_context depends on !patch && (context || org || report)@
+statement S;
+expression d;
+position j0;
+@@
+
+ d@j0 =
+* vmalloc
+ (...);
+ if (!d) S
+* memset(d, 0, sizeof(*d));
+
+@vzn1_context depends on !patch && (context || org || report)@
+type T;
+statement S;
+T *d;
+position j0;
+@@
+
+ d@j0 =
+* vmalloc_node
+ (...);
+ if (!d) S
+* memset(d, 0, sizeof(T));
+
+@vzn2_context depends on !patch && (context || org || report)@
+statement S;
+expression d;
+position j0;
+@@
+
+ d@j0 =
+* vmalloc_node
+ (...);
+ if (!d) S
+* memset(d, 0, sizeof(*d));
+
+@pci1_context depends on !patch && (context || org || report)@
+type T;
+statement S;
+T *d;
+position j0;
+@@
+
+ d@j0 =
+* pci_alloc_consistent
+ (...);
+ if (!d) S
+* memset(d, 0, sizeof(T));
+
+@pci2_context depends on !patch && (context || org || report)@
+statement S;
+expression d;
+position j0;
+@@
+
+ d@j0 =
+* pci_alloc_consistent
+ (...);
+ if (!d) S
+* memset(d, 0, sizeof(*d));
+
+@kmem1_context depends on !patch && (context || org || report)@
+type T;
+statement S;
+T *d;
+position j0;
+@@
+
+ d@j0 =
+* kmem_cache_alloc
+ (...);
+ if (!d) S
+* memset(d, 0, sizeof(T));
+
+@kmem2_context depends on !patch && (context || org || report)@
+statement S;
+expression d;
+position j0;
+@@
+
+ d@j0 =
+* kmem_cache_alloc
+ (...);
+ if (!d) S
+* memset(d, 0, sizeof(*d));
+
+@dma3_context depends on !patch && (context || org || report)@
+type T;
+statement S;
+T *d;
+position j0;
+@@
+
+ d@j0 =
+* dma_alloc_coherent
+ (...);
+ if (!d) S
+* memset(d, 0, sizeof(T));
+
+@dma4_context depends on !patch && (context || org || report)@
+statement S;
+expression d;
+position j0;
+@@
+
+ d@j0 =
+* dma_alloc_coherent
+ (...);
+ if (!d) S
+* memset(d, 0, sizeof(*d));
+
+@acpi1_context depends on !patch && (context || org || report)@
+type T;
+statement S;
+T *d;
+position j0;
+@@
+
+ d@j0 =
+* acpi_os_allocate
+ (...);
+ if (!d) S
+* memset(d, 0, sizeof(T));
+
+@acpi2_context depends on !patch && (context || org || report)@
+statement S;
+expression d;
+position j0;
+@@
+
+ d@j0 =
+* acpi_os_allocate
+ (...);
+ if (!d) S
+* memset(d, 0, sizeof(*d));
+
+// ----------------------------------------------------------------------------
+
+@script:python dma1_org depends on org@
+j0 << dma1_context.j0;
+@@
+
+msg = "Replace with dma_pool_zalloc."
+coccilib.org.print_todo(j0[0], msg)
+
+@script:python dma2_org depends on org@
+j0 << dma2_context.j0;
+@@
+
+msg = "Replace with dma_pool_zalloc."
+coccilib.org.print_todo(j0[0], msg)
+
+@script:python vz1_org depends on org@
+j0 << vz1_context.j0;
+@@
+
+msg = "Replace with vzalloc."
+coccilib.org.print_todo(j0[0], msg)
+
+@script:python vz2_org depends on org@
+j0 << vz2_context.j0;
+@@
+
+msg = "Replace with vzalloc."
+coccilib.org.print_todo(j0[0], msg)
+
+@script:python vzn1_org depends on org@
+j0 << vzn1_context.j0;
+@@
+
+msg = "Replace with vzalloc_node."
+coccilib.org.print_todo(j0[0], msg)
+
+@script:python vzn2_org depends on org@
+j0 << vzn2_context.j0;
+@@
+
+msg = "Replace with vzalloc_node."
+coccilib.org.print_todo(j0[0], msg)
+
+@script:python pci1_org depends on org@
+j0 << pci1_context.j0;
+@@
+
+msg = "Replace with pci_zalloc_consistent."
+coccilib.org.print_todo(j0[0], msg)
+
+@script:python pci2_org depends on org@
+j0 << pci2_context.j0;
+@@
+
+msg = "Replace with pci_zalloc_consistent."
+coccilib.org.print_todo(j0[0], msg)
+
+@script:python kmem1_org depends on org@
+j0 << kmem1_context.j0;
+@@
+
+msg = "Replace with kmem_cache_zalloc."
+coccilib.org.print_todo(j0[0], msg)
+
+@script:python kmem2_org depends on org@
+j0 << kmem2_context.j0;
+@@
+
+msg = "Replace with kmem_cache_zalloc."
+coccilib.org.print_todo(j0[0], msg)
+
+@script:python dma3_org depends on org@
+j0 << dma3_context.j0;
+@@
+
+msg = "Replace with dma_zalloc_coherent."
+coccilib.org.print_todo(j0[0], msg)
+
+@script:python dma4_org depends on org@
+j0 << dma4_context.j0;
+@@
+
+msg = "Replace with dma_zalloc_coherent."
+coccilib.org.print_todo(j0[0], msg)
+
+@script:python acpi1_org depends on org@
+j0 << acpi1_context.j0;
+@@
+
+msg = "Replace with acpi_os_allocate_zeroed."
+coccilib.org.print_todo(j0[0], msg)
+
+@script:python acpi2_org depends on org@
+j0 << acpi2_context.j0;
+@@
+
+msg = "Replace with acpi_os_allocate_zeroed."
+coccilib.org.print_todo(j0[0], msg)
+
+// ----------------------------------------------------------------------------
+
+@script:python dma1_report depends on report@
+j0 << dma1_context.j0;
+@@
+
+msg = "Replace with dma_pool_zalloc."
+coccilib.report.print_report(j0[0], msg)
+
+@script:python dma2_report depends on report@
+j0 << dma2_context.j0;
+@@
+
+msg = "Replace with dma_pool_zalloc."
+coccilib.report.print_report(j0[0], msg)
+
+@script:python vz1_report depends on report@
+j0 << vz1_context.j0;
+@@
+
+msg = "Replace with vzalloc."
+coccilib.report.print_report(j0[0], msg)
+
+@script:python vz2_report depends on report@
+j0 << vz2_context.j0;
+@@
+
+msg = "Replace with vzalloc."
+coccilib.report.print_report(j0[0], msg)
+
+@script:python vzn1_report depends on report@
+j0 << vzn1_context.j0;
+@@
+
+msg = "Replace with vzalloc_node."
+coccilib.report.print_report(j0[0], msg)
+
+@script:python vzn2_report depends on report@
+j0 << vzn2_context.j0;
+@@
+
+msg = "Replace with vzalloc_node."
+coccilib.report.print_report(j0[0], msg)
+
+@script:python pci1_report depends on report@
+j0 << pci1_context.j0;
+@@
+
+msg = "Replace with pci_zalloc_consistent."
+coccilib.report.print_report(j0[0], msg)
+
+@script:python pci2_report depends on report@
+j0 << pci2_context.j0;
+@@
+
+msg = "Replace with pci_zalloc_consistent."
+coccilib.report.print_report(j0[0], msg)
+
+@script:python kmem1_report depends on report@
+j0 << kmem1_context.j0;
+@@
+
+msg = "Replace with kmem_cache_zalloc."
+coccilib.report.print_report(j0[0], msg)
+
+@script:python kmem2_report depends on report@
+j0 << kmem2_context.j0;
+@@
+
+msg = "Replace with kmem_cache_zalloc."
+coccilib.report.print_report(j0[0], msg)
+
+@script:python dma3_report depends on report@
+j0 << dma3_context.j0;
+@@
+
+msg = "Replace with dma_zalloc_coherent."
+coccilib.report.print_report(j0[0], msg)
+
+@script:python dma4_report depends on report@
+j0 << dma4_context.j0;
+@@
+
+msg = "Replace with dma_zalloc_coherent."
+coccilib.report.print_report(j0[0], msg)
+
+@script:python acpi1_report depends on report@
+j0 << acpi1_context.j0;
+@@
+
+msg = "Replace with acpi_os_allocate_zeroed."
+coccilib.report.print_report(j0[0], msg)
+
+@script:python acpi2_report depends on report@
+j0 << acpi2_context.j0;
+@@
+
+msg = "Replace with acpi_os_allocate_zeroed."
+coccilib.report.print_report(j0[0], msg)
+
--
1.9.1
